DOCSLIB.ORG

United States Patent Office 2,136,483

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
United States Patent Office 2,136,483 Patented Nov. 15, 1938 2,136,483 UNITED STATES PATENT OFFICE 2,136,483. METHOD AND MATERIAL FOR PREVENTING THE TARNISHING of SILVERWARE Kenneth H. Barnard and Arthur F. McLean, Andover, Mass, assigaors to Facific Mills, Lawrence, Mass., a corporation of Massachus setts No Drawing. Application November 13, 1937, Serial No. 4486 m 4 Claims. (CI, 23-241). a This is an improvement on the method and ammonia of 26° Baumé. Add water to make the material patented by Grinnell Jones of Cam Solution up to ten gallons, or more or less accord bridge, Mass., Patent No. 1,766,646, June 24, 1930, ing to the silver concentration desired. Then pad for preventing the tarnishing of silverware. the cloth, which may be double-napped flannel 5 The Jones patent described a fabric for pro previously dyed, with this solution. The squeeze 5. tecting silverware from tarnish comprising a rolls of the padder will remove the excess of material, Suitable for wrapping, impregnated with liquid and the cloth may then be dried, prefer finely divided silver, or a compound thereof, which ably on a tenter frame in a current of warm air. WOuld Combine With the tarnishing gases in the The annonia evaporates, whereupon the silver O atmosphere and thereby protect the silver phosphate, being insoluble in water, is precipi O Wrapped in the protecting material. tated in the cloth in a finely divided state. The Jones patent describes a fabric impreg We then wash out the Sodium nitrate, the nated with silver or a silver compound to protect Other product of the reaction of Silver nitrate silver from tarnish. The specific example is dark and trisodium phosphate, in cold water and the 5 brown, Very powerful in color and will overpower cloth is thus left impregnated throughout with 5 other dyes and moreover is somewhat dusty and finely divided silver phosphate in amount corre uses a large amount of silver. Much of it has Sponding to the strength of the solution used, been used commercially. somewhat yellowish in color, as the protective Barnard and Kane Patent No. 2,003,333, June material. If desired the Sodium nitrate may be 20 4, 1935, describes a fabric impregnated with silver washed out of the precipitate before the precipi 20 ferrocyanide which is an improvement in vari tate is dissolved in ammonia. OuS Ways on the dark brown fabric described by If the color of the protective cloth is to be JOneS. The Barnard and Kane fabric has been brown, the uSual color, the foregoing process is Successful in commercial use, also. very satisfactory. The protective cloth, if beaten, While the cloth impregnated according to Will not give out any substantial amount of dust 25 Patent No. 2,003,333 is successful in protecting and the Silver gives the protection desired, as silver and has advantages over Jones' dark brown stated in the Jones patent. fabric it has the serious disadvantage that a part In some cases, however, the yellow silver tri of the in pregnating material is readily driven off phosphate may be undesirable as, for instance, 30 as a dust and thus silver is Wasted and further if a white or light-colored protective cloth is de 30 more, much silver is necessarily wasted in the sired. In Such cases. We use the same amount of proceSS of manufacture. sodium tetraphosphate (Na,6P4O13) and proceed as Our invention is also an improvement in other above stated. The silver tetraphosphate is white Ways Over the Grinnell Jones invention and the and will operate substantially as the triphosphate 35 invention of Patent No. 2,003,333. does. 35 Ol invention, in brief, consists in impregnat The cloth used and particularly described in ing the cioth to be protected. With a clear Silver the Jones patent, namely that precipitated from containing Solution Soluble in a Wolatile liquid, as silver nitrate by sodium carbonate, gives out a ammonia, which thus permeates the entire cloth. dust which is wasteful and dirties the hands of 40 When the volatile Solvent evaporates it precipi the operatives. Ferro-cyanide gives forth even 40 tates the silver salt in the material. In Conse more dust. quence little or none of the silver salt is lost in Various devices may be used to decrease the the process of manufacture and little or none amount of dust given or rubbed off from the Of the silver salt is lost as a dust when the fabric silver oxide cloth and the silver ferro-cyanide 45 is handled. cloth, but the cloth impregnated according to the 45 This principle may be carried out in many Ways, present invention is very much better than any of which the following is an example: way now known to us for diminishing the dust in First take five pounds of silver nitrate Crystals the silver oxide and the silver ferro-cyanide im dissolved in three gallons of Water and three and pregnated cloths. Furthermore, the advantages 50 one-half pounds of trisodium phosphate dis of having the silver Salt precipitated within the 50 Solved in three gallons of Water; mix the tWO fibres of the cloth in the manner shown makes a solutions (which may be done in tubs). This Will saving in the amount of silver required as all precipitate a yellowish white silver phosphate; the silver not taken up by the fabric may be add enough ammonia, to just dissolve this precipi used again as a part of the liquid used for 55 tate. This will require about one gallon of aqua impregnating a further batch of cloth. 2. 2,136,488 As stated, in the previous patents the amount impregnated with a phosphate of silver So as of Silver to be used per yard of cloth may be sociated with the fabric as not to give forth a varied within wide limits so that the above con dust in material quantities by ordinary handling. centration of Silver need not be followed closely. 2. A fabric for protecting silverware from tar The amount of silver required depends to a con nish comprising a fibrous material impregnated 5 siderable extent upon the conditions to which the with silver triphosphate so associated with the cloth is to be subjected in use, especially as to fibres as not to give forth a dust in material the amount of Sulphurous gases in the air to quantities by ordinary handling. which the cloth. is subjected, and the length of . ... 3. The method of impregnating a fabric with 10 time protection is desired. - - a silver phosphate which consists of precipitat 10 We have described the use of ammonia as the ing a silver phosphate insoluble in water by a Volatile Solvent because that is, by far, the Sim Suitable phosphate, dissolving the precipitate in plest solvent which will dissolve the silver phos-. aqua, annonia, impregnating the fabric with the phate or silver tetraphosphate, but any suitable dissolved precipitate, allowing the aqua, ammonia, 5 volatile solvent which will dissolve the silver to evaporate, thus precipitating the silver phos 5 containing Salt and evaporate quickly to precipi phate in the fabric and washing out the water tate it can be used. - soluble chemicals from the fabric. Furthermore, our invention is used if the 4. The method of impregnating a fabric with method of impregnating the cloth by soaking a silver salt which consists of precipitating a sil 20 it. With a silver-containing material insoluble ver salt insoluble in water by a suitable chem 20 in water, dissolved in a volatile chemical which ical, dissolving the precipitate in aqua ammonia, will precipitate the silver-containing salt in the impregnating the fabric with the dissolved pre fabric on evaporation is employed. cipitate, allowing the aqua ammonia, to evap The word "fabric' is broadly used to include orate, thus precipitating the silver salt in the any kind Of cloth, paper or fibrous or cellulosic fabric and Washing out the water soluble chem 25 material. icals from the fabric. We claim: 1. A fabric for protecting silverware from tar KENNETH. H. BARNARD. nish comprising a material suitable for wrapping, ARTHUR. F. McLEAN. 2.: .
Load more

Recommended publications
  • UNITED STATES PATENT OFFICE 2,510,510 GERMICIDAL DETERGENT COMPOSITION Elwyn E
    Patented June 6, 1950 2,510,510 UNITED STATES PATENT OFFICE 2,510,510 GERMICIDAL DETERGENT COMPOSITION Elwyn E. Mendenhall, Pittsburgh, Pa., assignor to Economics Laboratory, Inc., St. Paul, Minn., a corporation of Delaware No Drawing. Application October 3, 1945, Serial No. 620,172 9 Claims. (CL 252-107) 2 . This invention relates to improved germicides invention are not noticeably affected by light, and germicidal detergents and water softening and do not stain the skin. They may be used compositions, and more particularly to silver with soaps, in acid, neutral or alkaline Solution, containing glassy systems of value for Such uses. and are resistant to precipitation on contact with The usefulness of silver as a germicide has 5 organic materials found in wash or other Solu long been recognized. Numerous silver-contain tions. For these reasons, and in view of the high ing compounds have been used as antiseptics, activity of the compositions, that is, high germi such as silver acetate, silver bromide, silver chlo cidal effectiveness with low concentration of sil ride, and silver citrate. Silver iodide has been ver, they are of benefit as germicides and of par used in preparing colloidal silver preparations, 10 ticular advantage in germicidal detergentS alad and silver nitrate has also been used for this as germicidal water Softening agents. and numerous other purposes. Various silver The new compositions themselves may be effec vitellin preparations have been used as antiseptics tive water softening agents and may have effec in the treatment of the eyes, nose and throat. tive detergent properties, as when the composi Most such silver compounds are possessed of 15 tions consist of complex glassy phosphates con certain undesirable characteristics which detract taining some silver and substantial proportions of from their usefulness.
    [Show full text]
  • Ions and Silver Phosphate Nanoparticles with Hyaluronic Acid And/Or Chitosan As Promising Antimicrobial Agents for Vascular Grafts
    Int. J. Mol. Sci. 2013, 14, 13592-13614; doi:10.3390/ijms140713592 OPEN ACCESS International Journal of Molecular Sciences ISSN 1422-0067 www.mdpi.com/journal/ijms Article Complexes of Silver(I) Ions and Silver Phosphate Nanoparticles with Hyaluronic Acid and/or Chitosan as Promising Antimicrobial Agents for Vascular Grafts Dagmar Chudobova 1, Lukas Nejdl 1, Jaromir Gumulec 2, Olga Krystofova 3, Miguel Angel Merlos Rodrigo 1,2, Jindrich Kynicky 3, Branislav Ruttkay-Nedecky 1,2, Pavel Kopel 1,2, Petr Babula 2, Vojtech Adam 1,2 and Rene Kizek 1,2,* 1 Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; E-Mails: [email protected] (D.C.); [email protected] (L.N.); [email protected] (M.A.M.R.); [email protected] (B.R.-N.); [email protected] (P.K.); [email protected] (V.A.) 2 Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic; E-Mails: [email protected] (J.G.); [email protected] (P.B.) 3 Karel Englis College, Sujanovo nam. 356/1, CZ-602 00, Brno, Czech Republic; E-Mails: [email protected] (O.K.); [email protected] (J.K.) * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +420-545-133-350; Fax: +420-5-4521-2044. Received: 22 April 2013; in revised form: 3 June 2013 / Accepted: 5 June 2013 / Published: 28 June 2013 Abstract: Polymers are currently widely used to replace a variety of natural materials with respect to their favourable physical and chemical properties, and due to their economic advantage.
    [Show full text]
  • Standard X-Ray Diffraction Powder Patterns NATIONAL BUREAU of STANDARDS
    NBS MONOGRAPH 25—SECTION 1 9 CO Q U.S. DEPARTMENT OF COMMERCE/National Bureau of Standards Standard X-ray Diffraction Powder Patterns NATIONAL BUREAU OF STANDARDS The National Bureau of Standards' was established by an act of Congress on March 3, 1901. The Bureau's overall goal is to strengthen and advance the Nation's science and technology and facilitate their effective application for public benefit. To this end, the Bureau conducts research and provides: (1) a basis for the Nation's physical measurement system, (2) scientific and technological services for industry and government, (3) a technical basis for equity in trade, and (4) technical services to promote public safety. The Bureau's technical work is per- formed by the National Measurement Laboratory, the National Engineering Laboratory, and the Institute for Computer Sciences and Technology. THE NATIONAL MEASUREMENT LABORATORY provides the national system of physical and chemical and materials measurement; coordinates the system with measurement systems of other nations and furnishes essentia! services leading to accurate and uniform physical and chemical measurement throughout the Nation's scientific community, industry, and commerce; conducts materials research leading to improved methods of measurement, standards, and data on the properties of materials needed by industry, commerce, educational institutions, and Government; provides advisory and research services to other Government agencies; develops, produces, and distributes Standard Reference Materials; and provides calibration
    [Show full text]
  • RIVM Report 601780003 Nanomaterials Under REACH
    Report 601780003/2009 M.E.J. Pronk et al. Nanomaterials under REACH Nanosilver as a case study RIVM report 601780003/2009 Nanomaterials under REACH Nanosilver as a case study M.E.J. Pronk, Centre for Substances and Integrated Risk Assessment, RIVM S.W.P. Wijnhoven, Centre for Substances and Integrated Risk Assessment, RIVM E.A.J. Bleeker, Expertise Centre for Substances, RIVM E.H.W. Heugens, Expertise Centre for Substances, RIVM W.J.G.M. Peijnenburg, Laboratory for Ecological Risk Assessment, RIVM R. Luttik, Expertise Centre for Substances, RIVM B.C. Hakkert, Bureau REACH, Expertise Centre for Risk Assessment, RIVM Contact: B.C. Hakkert Bureau REACH, Expertise Centre for Substances, RIVM [email protected] This investigation has been performed by order and for the account of VROM, within the framework of REACH project number M/601780. RIVM, P.O. Box 1, 3720 BA Bilthoven, the Netherlands Tel +31 30 274 91 11 www.rivm.nl © RIVM 2009 Parts of this publication may be reproduced, provided acknowledgement is given to the 'National Institute for Public Health and the Environment', along with the title and year of publication. 2 RIVM report 601780003 Abstract Nanomaterials under REACH Nanosilver as a case study Some adjustments are needed in the European chemicals legislation REACH to assess and control the risks of nanomaterials. The information on substances to be provided under REACH is not sufficient to determine the specific properties of nanomaterials, nor to assess how these properties affect their behaviour and effects in humans and the environment. RIVM concluded this following research into the suitability of REACH for nanomaterials.
    [Show full text]
  • Karen Mclaughlin, Steven Silva, Carol Kendall, Hilary Stuart-Williams, and Adina Paytan. a Precise Method for the Analysis of Ph
    LIMNOLOGY and Limnol. Oceanogr.: Methods 2, 2004, 202–212 OCEANOGRAPHY: METHODS © 2004, by the American Society of Limnology and Oceanography, Inc. A precise method for the analysis of δ18O of dissolved inorganic phosphate in seawater Karen McLaughlin1, Steven Silva2, Carol Kendall2, Hilary Stuart-Williams3, and Adina Paytan1 1Department of Geological & Environmental Science, Stanford, CA 94305-2115, USA 2U.S. Geological Survey, Menlo Park, CA 94025, USA 3Research School of Biological Sciences, Australian National University, GPO Box 475, Canberra ACT 2601, Australia Abstract A method for preparation and analysis of the oxygen isotope composition (δ18O) of dissolved inorganic phosphate (DIP) has been developed and preliminary results for water samples from various locations are reported. Phosphate is extracted from seawater samples by coprecipitation with magnesium hydroxide. Phosphate is further purified through a series of precipitations and resin separation and is ultimately convert- ed to silver phosphate. Silver phosphate samples are pyrolitically decomposed to carbon monoxide and ana- lyzed for δ18O. Silver phosphate samples weighing 0.7 mg (3.5 µmol oxygen) can be analyzed routinely with an average standard deviation of about 0.3‰. There is no isotope fractionation during extraction and blanks are negligible within analytical error. Reproducibility was determined for both laboratory standards and natu- ral samples by multiple analyses. A comparison between filtered and unfiltered natural seawater samples was also conducted and no appreciable difference was observed for the samples tested. The δ18O values of DIP in seawater determined using this method range from 18.6‰ to 22.3‰, suggesting small but detectable natural variability in seawater. For the San Francisco Bay estuary DIP δ18O is more variable, ranging from 11.4‰ near the San Joaquin River to 20.1‰ near the Golden Gate Bridge, and was well correlated with salinity, phosphate concentration, and δ18O of water.
    [Show full text]
  • SCCS/1577/16 Final Version of 6 October 2016
    SCCS/1577/16 Final version of 6 October 2016 Scientific Committee on Consumer Safety SCCS OPINION ON preservative EcoG+ The SCCS adopted this opinion at its 2nd plenary meeting on 6 October 2016 SCCS/1577/16 Final version of the Opinion on Eco G+ About the Scientific Committees Two independent non-food Scientific Committees provide the Commission with the scientific advice it needs when preparing policy and proposals relating to consumer safety, public health and the environment. The Committees also draw the Commission's attention to the new or emerging problems which may pose an actual or potential threat. They are: the Scientific Committee on Consumer Safety (SCCS), the Scientific Committee on Health, Environmental and Emerging Risks (SCHEER) The Scientific Committees review and evaluate relevant scientific data and assess potential risks. Each Committee has top independent scientists from all over the world who are committed to work in the public interest. In addition, the Commission relies upon the work of the European Food Safety Authority (EFSA), the European Medicines Agency (EMA), the European Centre for Disease prevention and Control (ECDC) and the European Chemicals Agency (ECHA). SCCS The Committee, on request of Commission services, provides Opinions on questions concerning health and safety risks (notably chemical, biological, mechanical and other physical risks) of non-food consumer products (e.g. cosmetic products and their ingredients, toys, textiles, clothing, personal care and household products such as detergents, etc.)
    [Show full text]
  • TOXICOLOGICAL PROFILE for SILVER Agency for Toxic
    TOXICOLOGICAL PROFILE FOR SILVER Agency for Toxic Substances and Disease Registry U.S. Public Health Service December 1990 1 1. PUBLIC HEALTH STATEMENT This Statement was prepared to give you information about silver and to emphasize the human health effects that may result from exposure to it. The Environmental Protection Agency (EPA) has identified 1177 sites on its National Priorities List (NPL). Silver has been found at 27 of these sites. However, we do not know how many of the 1177 NPL sites have been evaluated for silver. As EPA evaluates more sites, the number of sites at which silver is found may change. The information is important for you because silver may cause harmful health effects and because these sites are potential or actual sources of human exposure to silver. When a chemical is released from a large area, such as an industrial plant, or from a container, such as a drum or bottle, it enters the environment as a chemical emission. This emission, which is also called a release, does not always lead to exposure. You can be exposed to a chemical only when you come into contact with the chemical. You may be exposed to it in the environment by breathing, eating, or drinking substances containing the chemical or from skin contact with it. If you are exposed to a hazardous substance such as silver, several factors will determine whether harmful health effects will occur and what the type and severity of those health effects will be. These factors include the dose (how much), the duration (how long), the route or pathway by which you are exposed (breathing, eating, drinking, or skin contact), the other chemicals to which you are exposed, and your.
    [Show full text]
  • Standard X-Ray Diffraction Powder Patterns
    7 NATL INST OF STANDARDS & TECH R.I.C. Nes AlllOD Ififib^fi PUBLICATIONS 100988698 ST5°5rv'25-17;1980 C.1 NBS-PUB-C 19 cr»T OF NBS MONOGRAPH 25-SECTION 1 V) J U.S. DEPARTMENT OF COMMERCE / National Bureau of Standards Standard X-ray Diffraction Powder Patterns . NATIONAL BUREAU OF STANDARDS The National Bureau of Standards' was established by an act ot Congress on March 3, 1901 The Bureau's overall goal is to strengthen and advance the Nation's science and technology and facilitate their effective application for public benefit. To this end, the Bureau conducts research and provides: (1) a basis for the Nation's physical measurement system, (2) scientific and technological services for industry and government, (3) a technical basis for equity in trade, and (4) technical services to promote public safety. The Bureau's technical work is per- formed by the National Measurement Laboratory, the National Engineering Laboratory, and the Institute for Computer Sciences and Technology. THE NATIONAL MEASUREMENT LABORATORY provides the national system of physical and chemical and materials measurement; coordinates the system with measurement systems of other nations and furnishes essential services leading to accurate and uniform physical and chemical measurement throughout the Nation's scientific community, industry, and commerce; conducts materials research leading to improved methods ol measurement, standards, and data on the properties of materials needed by industry, commerce, educational institutions, and Government; provides advisory and research services to other Government agencies; develops, produces, and distributes Standard Reference Materials; and provides calibration services. The Laboratory consists of the following centers: Absolute Physical Quantities- — Radiation Research — Thermodynamics and Molecular Science — Analytical Chemistry — Materials Science.
    [Show full text]
  • Preparation and Photocatalytic Activity of Silver Phosphate Modified by Nano-Silver Metal
    Digest Journal of Nanomaterials and Biostructures Vol. 15, No. 4, October-December 2020, p. 991-999 PREPARATION AND PHOTOCATALYTIC ACTIVITY OF SILVER PHOSPHATE MODIFIED BY NANO-SILVER METAL C. PENG, Y. LIU, J. CUI, Y. SHEN*, Key Laboratory of Environment Functional Materials of Tangshan City, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China Since the 21st century, a variety of photocatalytic materials have been developed, in which the properties are not the same, but the photocatalytic degradation activity of Ag3PO4 is much higher than other known visible light catalysts, and Ag3PO4 exhibits excellent performance under visible light. Photocatalytic performance has received attention. In order to prepare a more stable and efficient Ag3PO4 photocatalytic material, the photocatalytic performance of Ag3PO4 was improved by nano-metal Ag modification of Ag3PO4. Nano-modified silver phosphate was prepared by coprecipitation method and hydrothermal method using silver nitrate and potassium dihydrogen phosphate as raw materials, and analyzed by x-ray diffraction (XRD), scanning electron microscope (SEM), Photoluminescence (PL), ultraviolet diffuse reflection and photodegradation etc. The performance improvement effect of the prepared nano-metal modified silver phosphate was examined. In this experiment, Rhodamine was used as the degraded solution. Through the photodegradation experiment, that is, under the illumination of LED lamps, it can be observed that the performance of nano-metal Ag-modified silver phosphate is improved compared with pure Ag3PO4, and the prepared nano-metal Ag is modified. The degradation rate of rhodamine at Ag3PO4 can reach 99% at 10 minutes.
    [Show full text]
  • Current Intelligence Bulletin 70: Health Effects of Occupational Exposure to Silver Nanomaterials
    CURRENT INTELLIGENCE BULLETIN 70 Health Effects of Occupational Exposure to Silver Nanomaterials Centers for Disease Control and Prevention National Institute for Occupational Safety and Health On the cover: Silver nanomaterials and products or processes using silver nanomaterials. Clockwise from top left and ending with center: Composite image of cells 24 hours post-exposure to silver nanoparticles coated with polyvinylpyrrolidone. Nanoparticles, endoplasmic reticulum, nuclei, and mitochondria shown in white, red, blue, and green, respectively. Photo by Robert M. Zucker, U.S. EPA. Silver metal (Ag), crystal structure. Photo by ©Molekuul/Getty Images. Printed circuit boards and components, which frequently use silver. Photo by ©Isti2/Getty Images. Silver nanoparticles within macrophages in lung tissue. Photo by NIOSH. Silver nanoparticles imaged by scanning electron microscope. Photo by NIOSH. Sock fabric, which is among textiles that frequently contain silver as an antimicrobial agent. Photo by ©Gojak/Getty Images. A tradesperson uses an airless sprayer to apply paint containing silver biocide. Photo by Bruce Lippy, CPWR. Current Intelligence Bulletin 70 Health Effects of Occupational Exposure to Silver Nanomaterials DEPARTMENT OF HEALTH AND HUMAN SERVICES Centers for Disease Control and Prevention National Institute for Occupational Safety and Health This document is in the public domain and may be freely copied or reprinted. Disclaimer Mention of any company or product does not constitute endorsement by the National Insti- tute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Preven- tion (CDC). In addition, citations of websites external to CDC/NIOSH do not constitute CDC/NIOSH endorsement of the sponsoring organizations or their programs or products.
    [Show full text]
  • Specialty Silver Compounds
    Specialty Silver Compounds • Selection of silver compounds can be manufactured up to a purity of 99.999% • Batch production capability from grams to 200 Kg www.alfa.com Alfa Aesar have the capability of Specialized Silver Compounds producing batch sizes up to 200 Kg. Bulk packing sizes are customized to • Our specialized silver compounds are meet our customers’ requirements. available in catalog sizes to bulk quantities. Many silver compounds are • We can manufacture our silver compounds to specific purity on request. photosensitive. All our specialized silver compounds are packaged in lightproof • If you require a specialized silver compound containers. not listed we can discuss its manufacture. KEY FEATURES Manufacturing • A batch specific certificate of analysis is produced for each product. Alfa Aesar’s production operations offer a single source for silver salts from research to pilot plant • Each silver product batch has; scale. Full-scale production of these products is 1. Full metallic impurities typically measured available. by ICP-MS to ppm. 2. The silver content measured. Development • A selection of silver compounds can be With our extensive development capability, we manufactured up to a purity of 99.999% are able to supply advanced silver materials to meet your technical requirements. • Most other silver products are manufactured to 99.9% purity as standard. Quality Control We employ advanced quality control for both in-process and final product testing phases. The high standard of our modern quality control and assurance facilities is matched by the expertise of our experienced staff. Further details and prices for catalog quantities are available in the Alfa Aesar Catalog or via the web site www.alfa.com.
    [Show full text]
  • Support for 3Rd Regulatory Review on Nanomaterials – Environmental Legislation
    Support for 3rd regulatory review on nanomaterials – environmental legislation Ricardo Energy & Environment, Milieu Consulting and Danish Technical University October 2016 Support for 3rd regulatory review on nanomaterials – environmental legislation Europe Direct is a service to help you find answers to your questions about the European Union. Freephone number (*): 00 800 6 7 8 9 10 11 (*) The information given is free, as are most calls (though some operators, phone boxes or hotels may charge you). LEGAL NOTICE This document has been prepared for the European Commission however it reflects the views only of the authors, and the Commission cannot be held responsible for any use which may be made of the information contained therein. More information on the European Union is available on the Internet (http://www.europa.eu). Luxembourg: Publications Office of the European Union, 2016 ISBN 978-92-79-63779-7 doi:10.2779/49879 © European Union, 2016 Image © Shutterstock.com EUROPEAN COMMISSION Support for 3rd regulatory review on nanomaterials – environmental legislation Directorate-General for Environment Sustainable Chemicals 2016 EUROPEAN COMMISSION Directorate-General for Environment Directorate B— Circular Economy and Green Growth Unit B.2 Contact: Andrej Kobe E-mail: [email protected] European Commission B-1049 Brussels Support for 3rd regulatory review on nanomaterials – environmental legislation Project Report ___________________________________________________ Report for European Commission DG Environment ENV.A.3/ETU/2015/0030 ED 61552_Final Report | Issue Number 3 | Date 22/11/2016 Ricardo in Confidence Ricardo Energy & Environment Support for 3rd regulatory review on nanomaterials: Project Report | i Customer: Contact: European Commission Dr Mark Broomfield Ricardo Energy & Environment Customer reference: Gemini Building, Harwell, Didcot, OX11 0QR, United Kingdom ENV.A.3/ETU/2015/0030 Confidentiality, copyright & reproduction: t: +44 (0) 1235 75 3493 This report is the Copyright of the European e: [email protected] Commission.
    [Show full text]