Semperfli Picric Acid 5% Solution Dye Kit

Sale price£18.00 GBP


Semperfli Picric Acid 5% Solution Dye Kit

There are concerns over Picric in the fly fishing industry. Semperfli Picric is laboratory manufactured and is safe for dying of fly tying feathers, furs and synthetics. Semperfli recommend using Picric diluted 100ml (full bottle provided with 2 litres of water.  
Picric crystals or 2,4,6-trinitrophenol were dangerous and used for explosives, indeed the navy used this to fire canons pre 1916. It was first mentioned in alchemical writings of Johann Rudolf Glauber in 1742. The picric would form very sensitive picric salts within days of filling the shells and would often detonate from the shock of firing. Lacquering the insides of the shells and spraying them with a turpentine/starch solution neutralized the picric acid and prevented it from forming picric salts. Today people use diluted picric and store this in plastic containers.
Usage: Recommended using plastic bowls for dilution and use plastic tools to agitate the picric acid. We leave the materials in until they have visibly changed. Some materials like thick wings, grouse for example may take a couple of days for full penetration of the picric acid whereas pheasant tails can dye in 15 minutes to 1 hour. We use latex gloves as picric, although not dangerous does make your hand look like you have smoked 60 cigarettes per day for years we have found from accidental spillage when we first started working with the laboratory to manufacture the product. For safety with ALL dying, from picric dying to dying we use safety glasses and latex gloves.
Once the materials have achieved the olive colour that you require simply wash off excess picric under running water.

Package Contents:

  • 100ml Picric Acid Solution
  • Full Safety Data Sheet
  • Safety Gloves

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