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Fotospeed DY15 Fotodyes can be used to retouch or hand colour black and white prints. They can be used on any photographic emulsion and because they are true dyes they are completely absorbed by the emulsion leaving no surface marking. The Set includes 11 different colours with one reducer which can be used to correct mistakes by either partially or fully removing the dye from the print. All the dyes can be mixed together or diluted to produce any colour or shade required.
The dyes have no adverse effect on B/W or colour prints.
The dyes are extremely concentrated and caution should initially be exercised when diluting for use. It would be rare to need to use them undiluted.
Test the strength of colour on scrap prints. As a first test use 3 drops of dye to 1 teaspoon of water. You can then see the effect of stronger colour by adding more drops of dye.