Semperfli Picric Acid for home dying
There are concerns over Picric in the fly fishing industry. Semperfli Picric is laboratory manufactured to be safe for dying of fly tying feathers, furs and synthetics. Use Picric diluted 100ml (full bottle provided with 2 litres of water).
Picric crystals or 2,4,6-trinitrophenol were considered dangerous, and were used for explosives. The navy used it 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, it is used diluted and stored in plastic containers.
Usage: Semperfli use plastic bowls for dilution, and plastic tools to agitate the picric acid, before leaving the materials in until they have visibly changed. Some materials, like thick wings, may take a couple of days for full penetration of the picric acid, whereas pheasant tails can dye in 15 minutes to 1 hour. They also use latex gloves as picric, although not considered dangerous, does make your hand look like you have smoked 60 cigarettes per day for years! For safety, always 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. When dry, leave the feathers in a drying cabinet (a hairdryer is an alternative!)
PROTECTIVE EQUIPMENT - HAND PROTECTION - Use protective gloves. The most suitable glove should be chosen in consultation with the gloves supplier, who can inform about the breakthrough time of the glove material.
EYE PROTECTION - Wear approved, tight-fitting safety glasses where splashing is probable.
RESPIRATORY EQUIPMENT - Self-contained breathing apparatus where high splashing is likely.
OTHER PROTECTION Use of an eyewash station.
- 100ml Picric Acid Solution.
- Full Safety Data Sheet.
- Safety Gloves.
You Will Need:
- Plastic Bowl.
- Safety Glasses.
- Plastic Utensil (for removing from dye bath and washing).
- Safe drying space.
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