Description
Found your grandpa’s old expired foggy papers and don’t want to throw them out? Lith printing might be just what you’re looking for! Ansco 70 is a so-called lith developer. You can use this to make lith prints, which is a good use for old expired photo papers.
The results can be pretty artsy. The sample image is a print made using Ansco 70 on ancient Agfa Multicontrast MCP paper, which has lost all of its contrast. Developing it in a regular paper developer leads to a gray mess, but lith makes it usable again!
Mixing
This kit makes a liter of stock solution (500 A + 500 B). To mix a liter of working solution, use 1+1+23 (40+40+920ml).
- Add the contents of bag A into 400ml of warm water (~50°C). Stir until dissolved. Top off to 500ml.
- A chemical stirrer helps to crush the hydroquinone crystals that like to sit at the bottom of the mixing jug.
- Add the contents of bag B into 400ml of cold water. As cold as you can get it. Top off to 500ml.
- Bag B contains sodium hydroxide, which creates an exothermic reaction when added to water. It’s also really caustic: use plastic (not PET!), not glass, never use warm water, wear PBM’s, the works.
Usage notes
- Do not combine A and B before mixing a working solution.
- Use in a heated tray (30°C+), otherwise you’ll be waiting forever.
- Ansco 70 is slow, it might take anywhere from 5-10 minutes for an image to appear.
- The capacity is not very high: a liter of working solution at 1+1+23 develops about 2 25×30 sheets plus test strips. This kit should be enough for about 25 sheets of 25x30cm, or about 2 sqm of paper.
It goes without saying that NBTG is not responsible for improper handling of chemicals 😉
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