Crystal Violet, 25 Grams Use Crystal Violet to develop latent fingerprints on the adhesive side of almost any kind of tape, e.g., Scotch, electrical, Kraft, etc. Mix the powder in water, soak the tape in the solution and rinse with running tap water. The caution about working with Crystal Violet powder or solution is that it is a very messy dye and will stain skin, clothes, floors and counter tops. It may be very difficult, if not impossible, to remove the stains from some clothing, furniture and floor covering. Crystal Violet is also often used as a "theft detection powder." The item is first VERY lightly dusted with the powder and when the item comes into contact with moisture (for example, the thief's hands), it turns dark purple and stains anything that comes into contact with it. However, this use is NOT suggested due to the messy nature of the product and the fact that the stains DO NOT come out of most surfaces. NOTE: More Info in the Long Description Shelf-life of Crystal Violet powder: indefinite. The working solution should not be kept much longer than 3-6 months. While older solutions may continue to work, the results might not be as good.

Breakaway™ Tamper Evident Tape - Evidence or Security markings Breakaway™ Tamper Evident Tape protects the integrity of your items and evidence. Printed on an acetate base, the tape becomes extremely fragile when adhered to a surface. Attempts to remove the tape will cause it to shred. Serrated edges along the tapes edge make it nearly impossible to cut or remove the tape and reapply it without leaving apparent evidence of tampering. Attempts to remove the tape through chemical means will cause the ink to bleed, further indicating tampering. The split-back paper backing allows for easy removal of the backing and simplifies applications. Each design features a writable white strip along the tapes bottom edge. Each style of tape comes in a 1.375" x 108' (3.5 cm x 32.9 m) roll. • Available with Evidence or Security markings. • Tamper indicating • Comes in dispenser box for easy use • Writable • Red acetate tape, black printing.