Photographic Facts and Formulas
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B o o ks o n Pho tography ti cs for P oto r a ers Hans Harti n Ph. D . r ansl ated O p h g ph , by g, T by F M . F. P . S . 2 2 a es. Clot n Fra ri e S . r a k R. p , , R 3 p g h, s i lli am li nt. nd i t emi str fo r P oto r a er W . F 2 ed i on. Ch y h g ph , by R 18 a es. Cl ot 2 p g h , i t ri al C om osi ti on i n P oto r a rt ur Hammond . 2 P c o p h g phy, by A h 34 a es i ll ustrati ons. Cl ot p g , 49 h, - P oto En r avi n P ri mer Ste en H . Hor an. Clot h g g , by ph g h, . E i te r ank Fr a ri S M f amer a d d F . e . F C as r om Y our C . h by R p , , R r P . 8 . P ape , Pi ctori al L and sca e P oto r a the P oto Pi cto ri ali sts of B uf p h g phy, by h i l str ti ns. Cl ot f alo . 2 2 a es l u a o 5 p g , 5 5 h, P oto r a i c A musements W alter E . Wood u r . th edi ti on. h g ph , by b y 9 128 a es 100 i ll ustr ati ons. Cl ot p g , h, r a E . W all . C . S . P . S . P r acti cal C ol or P oto . F F h g phy, by J , , R C lot h, “ The A i r B rus i n P oto ra G eo . F . Sti ne. 1 a es h h g phy, by 43 p g , 45 i ll ustrati ons. Clot h, r m i r ns r D r mi M r B m i P ri nti n nd B o o l a fe . E l a ro o l a e . g T , by y M P a s r nsl ated b F r an . Fra ri e S . F . S. 1 e . a . T y k R p , , R 99 p g Clot h, P r acti cal P oto ra Seri es eac 0 cents i n a er i n cl ot h g phy , h 5 p p , h ’ H o Th r t of Ex os r . i nners rou l es. ow t 1. e u 2 e e S c e p e. B g T b 3 Ho to Mak P ri nts i n Colors. Ch oose and Use a Lens. 4. w e M r i ts ar . How to a Po tr a . How to Ma e Enl ements 6 . e 5 . k g k M a antern li s 8 Th Elements of P oto ra . How to e S e . e 7 . k L d h g phy Ho t to a i . Ho M o P ri nts w o e uc e t es. 10 w to a e o . 9. R h N g v k G d 11. Mod ern D evelopment. ENGLI SH I MPO RTATI O NS P oto r a Mad e E as as Eas as B C b . C i ld B a l e . h g phy y, y A , y R h y y 26 a es. P a er 4 p g p , The B arnet B oo of P oto ra . Clot k h g phy h , A rt of Retouchi ng Negati ves and P r acti cal Di recti ons for Fi ni shi ng and C olo ri n P oto r a i c Enl ar ements b o ert o nson g h g ph g , y R b J h , . S . B ruce and lf red B r ai t w ai te. B oard s T A h , i ro l i M t f i D rawi n b n H e c o r ree e od o L fe . B rau . g yph G k h g, y A A B oard s , P oto r ams of the Y ear . P a er Clot h g p , h, ’ Penrose s Pi ctori al A nnual . D e r sc iptiv e li st on r eq uest. P ubli shed o r I mported by A mer can oto ra c ub s n o i Ph g phi P li hi g C . 2 e b r M ss 8 w u St. s 1 us 4 N y , Bo ton 7, a ach etts PHO T O G R A PHI C F A C TS A N D FO R M U L A S A L L F . F P . E . R . B W . C . S . 8 y J , , s i a E i r f A soc te. d to o AMERI CAN PHO TO GRAPHY “ A utlz or o P r acti cal C olo r P oto r a etc. f h g phy, M E S A RICAN PHOTOGRAPHIC PUBLI HING Co . M . S O . BOST N , ASS U A 1924 o r i t 1924 C py gh , , by A E A A I N M RIC N PHOTOGR PHIC PUBLISH G CO . E nter ed at Stati on er s Hall r i n te an ound i n the U . S . A P d d b . F i r st ed t on J u 1924 i i , ly , The i n r p e ess oston ass U . S . Al P , B , M , A R R A N Foreword h idea k e t com ilation o The main x p in view in the p book has been to provide in condensed form Working formulas and instructions for the various processes of photography . There must necessarily be errors of nd omission and commission , a the publishers will be to an who grateful y reader , consulting its pages and _ to w failing find hat he requires , will at once communi cate with them , in order that the omissions may be remedied in future editions . Forms for this purpose of will be found at the end the book . The formulas given have not been selected in hap hazard fashion but , as far as possible , only from credit able sources . Certain valuable information , received after the body of the book was made up into pages , will be found in the A ppendix at page 376 . Contents Foreword Contents Studio and Workroom Orthochromatic Photography Plate Backing Focus and _ Optics Exposure Development Developers Fi xing and Clearing I ntensification Reducers Va rnishes Silver Printing Processes Printing-O ut Papers Salted Paper Bromide Paper Developing-O ut Papers Toning Bromide and Gaslight Prints S ulphide Toning The Carbon Process The Gum-Bichromate Process CONTENTS The Iron Processes Platinotype Ozotype and Allied Processes Oil and Bromoil Miscellaneous Printing Processes Mountants Stereoscopic Work Lantern Slides Enlarging Flashlights Colour Photography Photomechanical Processes Weights and Measures Chemical Tables Appendix Index Studio and Work room -I t u WEIGHTS AND MEASURES . will be noted that form las in this work are usually given both in metric and duodecimal m i ? . ( or Brit sh and U . S ) weights and measures The etric weights and measures are not the exact equivalents of those in the other systems ; but the rati o of the ingredients in each “ e u column is the sam . Readers m st therefore rigidly adhere o one or an not out t the other system, d weigh solids in grammes and ' measure liquids by ounces or a hopeless muddle on will result . In all cases the conversion has been made the assumption that photographic solutions are measured and not out on weighed and , therefore , the ratios are based a uniform 6 0 . bulk of 16 oz . or 7 8 minims In many cases fractional parts have been omitted or rounded offto the nearest practical too 1000 or 16 oz . quantity . In all cases , , the quantities , ccm , mean that these should be the total bulk of the solution when h r i se to bf e w . made , unless stated Therefore , it is advisable dissolve the dry ingredients in some of the solvent and then make up to the given bulk . B A CKG R O U N Ds — . Cloth is the best material , and can gener u 96 . ally be obtained p to inches in width Calico , bleached or u to 72 nbleached , can be obtained up inches wide ; brown felt u 60 . of u paper p to inches Small p ieces cardboard , abo t u u . L a or V2 inch sq are , are req ired y the stretcher frame flat on f r - the loor , and get a f iend to hold the right hand bottom corner of the material down to the corresponding corner of u u the frame , stretch the material q ite ta t , and nail down the _ - to of top left hand corner the edge the frame . Drive the tack or nail through a piece of cardboard and the material at 2 PHOTOGRAPHIC FACTS A ND FORMULAS both corners .