Cold mounting or embedding is when a resin is mixed with a hardener (or accelerator) to provide the mounting compound, and then the polymerization process take place to form the block. In some cases, this process gives-off heat. However this heat generation can be controlled by the use of ice or cool air blow setting. Cold mounting compounds are preferred for specimens that are sensitive to the heat or pressure, which applies during the hot mounting process. There are three types of cold mounting:

Epoxy Systems - Epoxies have the lowest shrinkage of all cold mounting resins. The curing time is relatively long, but the adhesion to most materials is excellent. They are also used for vacuum impregnation. The hardened epoxy is duroplastic and not affected by moderate heat or chemicals.

Choosing a Cold Mount*

Cat # Resin Color Curing Time Shrinkage
From 1-4
(Best: 1)
Hardness Application
1232 EpoFix Clear, Transparent
Refractive index: ND = 1.578
Approx 12 hours 78 Shore D Vacuum impregnation
Porous samples
Mineralogical samples
1245 Epoxy-Dye Fluorescent dye for use in microscopy to make cracks and pores visible. For use with EpoFix and Unimount
* 30 mm dia. mount with a 45% carbon steel specimen (20 vol%)


Cat # Mixing Ratio
Mixing Ratio Volume Mixing
Potlife Color Can be colored with EpoDye Can be colored with AcryDye Peak Temp
1232 Resin:
25 parts
Hardener: 3 parts
15 parts
Hardener: 2 parts
Clear, Transparent
Refractive index: ND = 1.578
X   40°C
1245 Fluorescent dye for use in microscopy to make cracks and pores visible

EpoFix hardenening liquid only

Cat # Description MSDS Pack Price Quote Quantity
Cat #: 1232 Description: EpoFix Pack: Kit Price: $209.00 Add to Quote:
Cat #: 1245 Description: Epoxy-Dye, 20g Pack: 20 g Price: $102.00 Add to Quote:
Cat #: 1232-H Description: EpoFix hardenening liquid only Pack: 250 mL Price: $57.00 Add to Quote: