Infrared Filter Coating for Photoflash Bulbs

Eosin 2524 - 4 grams
Tartrazine N.250 - 6 grams
Coomassie Violet R.S. - 4 grams
Lissamine Green - 10 grams
Gelatin (Nelson's Hard) - 200 grams
Glycerine - 100 mL
Water to 1 L

Anti-Dazzle coating for phtoflash bulbs used in conjunction with [panchromatic films]

Coomassie Violet R.s. - 10 grams
Gelatine - 200 grams
Glycerine - 100 mL
Water to 1 L

Formula for converting "cellophane" photoflash safety covers into anti-dazzle filters

Purple Covers:
Methyl Violet - 4 grams
Glycerine - 10 mL
Warm water 200 mL

Yellow Covers:
Tartrazine - 4 grams
Glycerine - 10 mL
Warm water - 200 mL


If anyone has sources for these dyes or substitutes, pray tell! The two part formula for the "safety covers" holds promise as these appear to be more sourceable dyes (eBay for the methyl violet and here for the tartrazine). One could dye acetate (or cellophane wrap for that matter) or some other clear plastic for use over modern strobes.

Someone in a medical discipline might be able to obtain these from a lab or university as many of these dyes are used in biological staining.

However, if a two part tartrazine & methyl violet stain will work for IR; those two are easily found for less than $15 total and might be the best bet.