The 240 bloom Gelatine I get from a seller on ebay called MissMarshmallow, for 1 litre of Glop you need 100 grams of Gelatine. The Pigment can be any coloured pigment with fine particles (I use Black India Ink at the moment bought from Amazon) I use 10ml per litre of Glop. The Sugar can be bought from anywhere you will need 50 grams per litre of Glop.
Now the hard bit (and the bit that may cause the death of Carbon Printing in the EU) there is a directive from the EU banning the use of Dichromates from 2017 (although there is an exemption for large users) and both Potassium Dichromate and Ammonium Dichromate are included which are the sensitisers and you will need to use anything from 0.5 grams per 100ml to 10 grams per 100 ml to make a number of stock solutions (see photo above). This is then used 1:2 with acetone (for a 8x6 inch tissue for a 5x7 contact print you need about 4-5 ml of stock sensitiser and 8-10 ml of Acetone). The Acetone can be purchased in bulk from ebay. The reason for the different strengths of Sensitiser is that this is one of the ways of controlling contrast of the print (the other is using more or less pigment, but to get used to the process it is important to standardise your Glop and keep the pigment levels static). Isopropyl Alcohol can also be bought from ebay.
Ammonium & Potassium Dichromate is again currently available from ebay although for how much longer no one is sure. I have been stockpiling both recently and probably have enough now of both to last me to the end of my printing days.
Equipment you will need:
Contact Printing Frame (Vacuum Frame required for larger prints)
UV Light Source (this could be the sun) I made a UV source using 2ft Batten Holders and Actinic Tubes
Foam Brushes (not with plastic handles)
Dishes/Trays (larger than the largest size print you wish to make)
Safelighting (Can be a Tungsten Lamp 40W or less), I use 3x Duka Safelights (with white filter, just because I have them) any light with output in the orange/red band should work (energy saving bulbs will not in any form).
Water (Hot and Cold)
Glass Plate (1 have a 10mm x 600mm x 600mm and a 12mm x 600mm x 600mm but could have easily got away with less)
Strips of Lexan (to create frame for Tissue Pouring) I have 1.0 & 1.5mm thicknesses but am thinking of buying some 2mm too (to allow the use of different thickness tissues).
Squeegees (Ordinary Window Cleaners squeegees are best)
Paper for the Tissue support (I use Lana Vanguard Synthetic Watercolour Paper as its re-useable).
Cardboard (Cut from boxes)
Mapping Pins
Some means of hanging Tissue/Prints to dry.