Epoxy Hardners 
Anhydrides Unmodified and Modified Hot Setting

DENOMINATION	PHYSICAL FORM	VISCOSITY AT 25OC cps	M.P. OC	MIXING RATIO	RECOMMENDED APPLICATION
LAPOX K-1	White powder	--	129-131	100:30	Used with LAPOX C-1 for electrical castings. (Class B)
LAPOX K-3	White crystals	--	33	100:80	Used with casting and laminating resins and suitable accelerator. Gives good tracking resistance and UV resistance
LAPOX K-76	Liquid w/ tendency to crystallize	--	--	100:80	Similar to K-3, but being in the liquid form, is easier to process. Good UV and tracking resistance.
LAPOX K-8	Pale yellow flakes	--	75-79	100:40	Used mainly with LAPOX C-1 casting by pressure gelation.
LAPOX K-11	White powder	--	77-82	100:30	Less reactive than K-1; hence used with LAPOX C-1 for large electrical casting to minimize shrinkage stress.
LAPOX K-12	Liquid	150-200	--	100:100	Very convenient hardener for use with liquid casting resin (C-17) by vacuum or or pressure gelation. Must be used together with an accelerator
LAPOX K-61	Liquid	1500-2500	--	100:80	Used only with LAPOX C-50 for casting by pressure gelation.
LAPOX K-68	Liquid	200-350	--	100:80	Used with casting and laminating resins together with an accelerator to obtain high heat distortion temperature.

MIXING RATIOS OF GENERAL PURPOSE HARDENERS ARE WITH REFERENCE TO A STANDARD LIQUID BASIC RESIN (B-11). WHERE HARDENERS ARE INTENDED FOR USE WITH A SPECIFIC RESIN, THE RATIO REFERS TO THAT RESIN WHICH IS SPECIFICALLY INDICATED.