ink, ink for self-inking rubber stamps, plastic, glass, metal, ink for special materials, supermarking ink, willmark ink by willard marking devices,

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3725 Valley Quail Lane
Klamath Falls, OR 97603
Tel (541) 205-5606
Tel (800) 447-9668
Hours: 9 to 5, Monday through Friday
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INKS - Recomendations for Specific Materials

Aircraft Parts - Marking Aircraft Parts/Stamping Aircraft Parts.
A lot of people use #1250 to mark parts. It meets A-A-208D. But some clear coats will dissolve impressions by it, so if the spec is open, we would recommend #6459 1 part epoxy for its excellent adhesion to metals and its solvent resistance. If you have to meet A-A-56032D, then you’ll have to use the #6050 two part epoxy.

Aluminum - Marking Aluminum Parts/Stamping Aluminum Parts.
#1250 is a popular ink to mark. It meets A-A-208D.
SELF-INKING: Pre-ink stamps using Ultifast multi surface ink works well on aluminum.

Cardboard - Stamping cardboard.
Ordinary stamp pad ink usually works. If you get feathering switch to an indelible ink.
SELF-INKERS: Standard self inkers and pre-ink stamps usually work fine. For glossy printed surfaces, use quick-dry ink in self-inkers or ultifast multi surface ink in pre-inks.

Ceramics - Marking Ceramic Parts/Stamping Ceramic Parts.
Unglazed ceramics can be highly porous so an indelible ink is good.
One or two part epoxy inks also work well on them.

Cellophane - Marking Cellophane/Stamping Cellophane
Your #620/#628 plastic marking inks are the best for this.

Concrete - Marking Concrete/Stamping Concrete.
#42M is the ink for this. It has heavy density and is fade resistant and weatherproof.

Circuit Boards - Marking Circuit Boards/Stamping Circuit Boards
#432 is generally considered your circuit board ink. It has two main properties in its favor: it can take a wide variety of organic solvent baths, and it’s non-conductive. If, however, you put your boards through a muriatic acid/alkali wash, #6606 works best.
Glass - Marking Glass/Stamping Glass
Generally with glass, you want a fast drying in to avoid smudging. Super marking, 6606 and 628 are recommended.

High Temperature Inks/Heat resistance - #6459 is good up to 650°F, but if it doesn’t meets your needs we can special order other high-temperature inks.

Labels - Stamping Labels.
#1250 is your best ink for labels. Pre-ink stamps with Ultifast multi surface ink can also be used.

Leather - Stamping Leather.
Use indelible ink.

Metal Parts - Marking Metal Parts/Stamping Metal Parts.
The best ink for marking metal in terms of adhesion is 6459, but 6606 and 1250 work well.

Nylon - Marking Nylon/Stamping Nylon.
#628 works best.

Painted Surfaces - Marking Painted Parts/Stamping Painted Parts.
#620 ink will give a dense, waterproof fade resistant impression on painted parts. Other inks, such as #1250 work as well.

Paper - Stamping paper.
Generally ordinary stamp pad in is fine for this. Numbering machines and pre-ink stamps work well as well.
SELF-INKERS: Standard self inkers and pre-ink stamps usually work fine. For glossy printed surfaces, use quick-dry ink in self-inkers or ultifast multi surface ink in pre-inks.

Photos - Stamping photos.
#1250 works really well. Super-marking ink OK.

Plastics - Marking Plastic Parts/Stamping Plastic Parts.
A lot of inks will work on plastic, but some plastics such as polyethylene don’t mark well.
#620 and #628 are your plastic marking inks. These will work on polyethylene.
Untreated polyethylene is particularly hard to mark. Your best bet is #628.

Rubber - Marking Rubber Parts/Stamping Rubber Parts.
#1141 ink is the best for rubber parts. It doesn’t flake off when the surface is flexed. It dries slowly enough to be usable in metal-frame SELF-INKERS.

Shrink Wrap - Marking Shrink Wrap/Stamping Shrink Wrap.
#620 works well. If you temperature resistance, contact us. There are specialized inks we can get.
Silicone - Marking Silicone/Stamping Silicone.