williamson logo


 

Natural Rubber printing compounds are designed for performance with common alcohol and water based inks.

Synthetic or Buna N compounds are preferred when co-solvent inks
are used.

Vinyl compounds are recommended for process colour printing with solvent inks. Noted for outstanding dot holding capability, smooth clean ink transfer and superior wear life.

Ethylene-propylene EPDM compounds are used in critical acetate and keytone applications. (Upon request only)

Performance Guide to Plate Moulding Compounds

Physicals

Natural

Synthetic

Vinyl

EPDM

Durometer Range

20 - 70

20 - 90

50 - 55

50

Tear Resistance

Good

Good

Excellent

Good

Abrasion Resistance

Excellent

Good

Excellent

Good

Compression Set

Good

Fair

Fair

Good

Rebound

Excellent

Good

Good

Good

Solvent Resistance

Natural

Synthetic

Vinyl

EPDM

Oil

Poor

Excellent

Excellent

Fair

Aliphatic

Poor

Excellent

Excellent

Fair

Aromatic

Poor

Good

Good

Poor

Alcohols, glycols

Good

Excellent

Excellent

Good

Keytone, Acetate

Good

Very Poor

Poor

Very Good

Resistance To

Natural

Synthetic

Vinyl

EPDM

Oxidation

Good

Good

Excellent

Excellent

Ozone

Good

Fair

Excellent

Excellent

Heat Aging

Good

Excellent

Good

Excellent

All moulding compounds are supplied 18" in width
- approximately 50 pounds per roll.