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Toning B&W Prints

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Toning B&W Prints December 2001 FACT SHEET TONING B&W PRINTS USING TONERS WITH ILFORD PAPERS FOR CHANGING THE IMAGE COLOUR AND PROTECTING THE PRINT ILFORD MULTIGRADE FB WARMTONE and REASONS FOR TONING ILFORD MULTIGRADE RC WARMTONE papers are There are many reasons for toning prints. specially designed to be receptive to all toners and can be toned to give subtle colour changes or Aesthetic effect and creating mood dramatic effects. For many years, photographers have used toners to improve the appearance of their pictures and as ILFORD ILFOSPEED and ILFORD ILFOBROM an aid in creating a certain atmosphere that they GALERIE FB papers respond to some toners. As a may wish to convey. For example, subjects like general rule, the latest paper emulsions, for portraits, sunlit landscapes and sunsets often example, ILFORD MULTIGRADE IV papers, are benefit from warm brownish or even reddish designed to be resistant to image colour changes toning whereas subjects such as snow scenes, and hence they maintain their quality in poor seascapes and night views suit the use of blue processing conditions. toners. All ILFORD papers can be toned for the protective Additional protection effect of some toners. Some toners convert or coat the silver image giving it greater resistance to damage from ILFORD papers are toned in a similar way to other external contaminants. papers. Toning resin coated papers is generally more convenient than toning fibre base papers, Instant test of adequate fixing because of the shorter washing times. Some Prints that are not fully fixed will show staining toners, although with similar names, for example, when transferred to a toning bath. blue toner, can give different results depending on their formulation. Increased maximum density Some toners increase density (for example, blue Before using toners, please read their safety data and selenium toners) while others reduce the sheets carefully and observe the safety precautions density (sulphide toners, direct and indirect, and written in them. These sheets are available, free of most dye toners). More details are given overleaf. charge, from the suppliers of the chemicals. In the absence of any specific safety precautions you Different overall print colour should always: Dilute toning baths can give prints with a different overall colour for some tastes. 1 Work in a well ventilated area. 2 Wear safety spectacles and gloves when handling chemicals. 3 Wash your hands thoroughly after handling chemicals. 4 If you feel you have come into contact with the chemicals and feel unwell, seek medical advice and take the chemical container with you. 5 Never eat or drink while handling chemicals. 6 Never smoke while handling chemicals. Page 1 of 4 TONING B&W PRINTS INDIRECT SULPHIDE TONERS DIRECT SULPHIDE TONERS Prints toned in indirect sulphide toners generally Prints toned in direct sulphide toners generally have lower density and contrast than untoned have similar density and contrast to untoned prints. prints. Direct sulphide toners are single solution toners Indirect sulphide toners use a two-step, bleach and which act on the image directly to convert it, redevelop, process to convert the silver image, partially or completely, to silver sulphide. either partially or completely, to brown silver sulphide. Direct sulphide toners have the advantage that toning can be stopped when the desired colour is The bleach is usually a ferricyanide bromide type reached and partially toned prints can be further which converts the silver image to silver bromide. treated in other toners. The darkening (redeveloping) solution can be a solution of sodium sulphide. However, this solution These toners can be used at room temperature but has a very nasty smell and most darkroom users they act very slowly, taking up to 30 minutes to now prefer to use the odourless toners. reach completion. This can be shortened considerably by raising the temperature to 38ºC. Odourless toners use an alkaline solution of thiourea to convert the silver bromide image to Direct sulphide toners have very little effect on silver sulphide. Apart from being odourless, they MULTIGRADE IV papers, but they work well with also have the advantage of allowing the resulting MULTIGRADE WARMTONE papers. image colour to be adjusted by controlling the pH of the second bath. The pH adjustment is achieved Examples by adding more or less sodium hydroxide solution Examples of commercial direct sulphide toners to the second bath. More additive gives a colder include: Agfa Viradon, Kodak Brown Toner, image tone, less additive gives a warmer image Photographers’ Formulary Hypo-alum and tone. Prints toned to have a very warm image tone Photographers’ Formulary Polysulfide. generally have considerably lower density and contrast than untoned prints. SELENIUM TONERS Prints toned in selenium toners generally have These variable warmth toners work well with all higher density and contrast than untoned prints. ILFORD papers, but a larger addition of the They also have a higher maximum density. sodium hydroxide solution is needed with MULTIGRADE WARMTONE paper to prevent the Selenium toners are single solution toners that image tone from becoming too yellow. partially convert the original silver image to silver selenide. The degree of toning can be varied by The sulphide sepia toners and non-variable warmth changing the toning time or solution dilution. thiourea toners work well with MULTIGRADE WARMTONE papers, but give a rather cold brown MULTIGRADE IV papers show very little colour image colour on MULTIGRADE IV papers. change in selenium toners. MULTIGRADE WARMTONE papers are very responsive to Prints toned in sepia toner can be further toned in selenium toners. Toning MULTIGRADE blue (iron) toner to give a green tone or, if only WARMTONE papers with higher dilutions (for partially bleached, a blue/green/sepia split tone. example, 1+10, 1+20) of selenium toner gives a They can also be treated in a gold toner to slight cooling of the image tone and a shift in the produce an orange-red image. hue towards red. Used at lower dilutions (for example, 1+3, 1+5), a purplish brown can be Examples achieved. Examples of commercial indirect sulphide toners include: Berg Rapid RC Sepia, Kodak Sepia, Examples Photographers’ Formulary Sepia Sulphide 221 and Examples of commercial selenium toners include: Tetenal Sulphide. Berg Selenium, Fotospeed SLT20 Selenium, Kodak Rapid Selenium Toner and Maco Selenia. Examples of commercial thiourea toners (non- variable warmth) include: Photographers’ Formulary Thiourea and Speedibrews Speedisepia. Examples of commercial thiourea toners (variable warmth) include: Fotospeed ST20 sepia toner, Rayco Varisepia, Tetenal Triponal and Tetenal Tri- toner. Page 2 of 4 TONING B&W PRINTS GOLD TONERS GUIDELINES FOR BETTER TONING Prints toned in gold toners generally have similar density and contrast to untoned prints. Exposure Some toners increase density (for example, blue Most commercial gold toners are single solution and selenium toners) while others reduce the toners which, when used on their own, shift the density (sulphide toners, direct and indirect, and image colour of a print to blue-black. However, most dye toners). Accordingly, it is often necessary they are often used in combination with a sepia to adjust print exposure slightly following some toner to produce an attractive orange-red colour. initial tests. Examples Development Examples of commercial gold toners include: Berg It is most important that prints are always fully Gold Protective Solution, Photographers’ Formulary developed. In fact with sepia toning, Gold 231 and Tetenal Gold Toner. overdevelopment (+50%) is a good way of obtaining the slight extra density needed. METAL REPLACEMENT TONERS Prints toned in blue toners generally have higher Stop bath density and contrast than untoned prints, and a A stop bath is essential as it prevents uneven higher maximum density. Prints toned in red toners development which is much more apparent after generally have lower density and contrast than toning. untoned prints, and a lower maximum density. Fixing Metal replacement toners, usually a single solution, Fixing should be thorough to prevent staining. Two convert the original silver image to the bath fixing is preferred, and the use of hardening ferrocyanide salt of a transition metal. A number of fixers is not recommended. The use of a hardening metals can be used. These toners can produce fixer will make fixing, washing and toning the very vivid colours. When using a blue toner with prints much more difficult. fibre base papers, it is recommended that the highlights are cleared in a 2% solution of sodium Washing chloride. With MULTIGRADE WARMTONE papers, Washing should be thorough as many toners react metal replacement toners are expected to be used with residual thiosulphate to produce staining mainly in combination with other toners. and/or bleaching. Exceptions are hypo-alum toner and Kodak T21 gold toner, which can be used Examples with a short wash after fixing. However, it is Examples of commercial metal replacement toners possible to wash out the optical brighteners in include: Berg Brilliant Blue, Fotospeed BT20 blue MULTIGRADE FB WARMTONE paper with toner, Fotospeed RT20 red toner, Maco LP Azur, prolonged washing. Photographers’ Formulary Iron Blue, Rayco Blue, Speedibrews Blue, Tetenal Blue Toner and Tetenal Using toners Copper-Red-Toner. Always use a generous amount of toning solution in a dish one size bigger than the paper. Toning DYE TONERS can be uneven if insufficient solution is used. Use The silver image is replaced with a dye image. intermittent agitation, that is, intermittently rock the Examples of these dye toners include those from dish when toning single sheets, or interleave them Colorvir and Berg. when toning several sheets of paper at once. Always wear protective gloves when using toners. Bleaching Where there is a bleaching step, this is usually taken to completion, unless a split toning technique is being used. Sulphiding or darkening solutions The solutions normally used in bleach and redevelop sepia toning are either a 1–2% solution of sodium sulphide or an alkaline solution of thiourea.
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