LDP LLC - MaxMax.com

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New UV Invisible Ink - Red


We have red UV ink in two types: inorganic made from our UVLWR powder and organic made from our UVXPBR powder.  The inorganic materials are sunlight stable, heat stable and last a very long time.  However, they are more expensive, not as bright and harder to print with because the inorganic materials are very fine crystals.  The organic materials are brighter, cheaper and can bed dissolved in some solvents, but fade in about 1 week under sunlight.  If left in the dark, the organics can last years.

UVSWR Series - Red Inorganic Dispersions

Our UVInkLWR-1 is a custom formulation made from our UVLWR inorganic powder in a water based 10% dispersion.  

  (UVXPR Series) - Bright Organic Red Solution

Blacklight / Ultraviolet (UV) Viewable - Acetone Based

Our Invisible Ink uses special High-Brightness Ultraviolet (UV) Blacklight Viewable compounds.  The Invisible ink glows a bright red (617nm) under a UV or Blacklight including our special UV flashlight.  Under normal light, this ink is completely invisible.  This ink can only be seen when illuminated by a UV or Blacklight emitting in the 350nm - 385nm light range.  The ink is permanent and can be applied to paper, plastic, wood and almost any substance.  Not recommend for use on skin since the ink contains acetone.  The ink does not wash off.

Available as an ink in 1/4 Ounce or 2 Ounce bottles and in writing or jumbo marking pens.


bullet  Please test on an inconspicuous area first!  Acetone may cloud or discolor some plastics or paints.  Always keep cap on pen when not in use.  Always keep away from open flame.  This ink contains acetone which is flammable.
bullet The 400nm LED lights don't work very well with our acetone red ink (XPR- series).  They do work very well with the invisible blues.  The 375nm LED and fluorescent tube lights work excellently with the XPR series inks.  If you have an inexpensive UV LED light, you most likely have a 395nm / 400nm type which will not work well with the XPR ink.  If you have a UV fluorescent tube, the XPR ink should work well.
bullet The lower the wavelength, the redder the UVXPBR ink will appear.  At 385nm, the ink fluoresces light pink.  At 365nm, the ink turns a brighter, deeper, red.
bullet All UV fluorescent inks will eventually degrade under sunlight after a week or two if left in direct sunlight.  If ink is not exposed to the sun, the ink will last indefinitely unless worn or washed off.


bullet Security Codes
bullet Use to mark personal belongings invisibly
bullet Permanently mark or sign documents to prevent forgery and fraud
bullet ink can be seen under an ultraviolet lamp by police departments
bullet Suitable for plastics





Example of ink applied on corner of clear PVC plastic



Example of ink applied on white consumer HDPE container


$14.75 each

Invisible Bright Red

Acetone Solvent Based

Works best with UV light below 380nm

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$39.15 each

Invisible Bright Red

Acetone Solvent Based

Works best with UV light below 380nm

Add to cart