OPTICAL SURFACE

All contaminants, chemicals, pencil marks, etc., should be removed from the glass surface.

Stubborn material can be removed by scouring with a paste of pumice or calcium carbonate and

water. The residue should be removed with deionized or distilled water. The glass surface

should then be thoroughly cleaned with acetone, using moistened (not wet), clean cheesecloth

or lens tissue. Cotton tipped applicators should not be used. The glass surface must be dry

before either primer or bonding material is applied.

METAL SURFACE

Except in special cases, the metal bonding surface must be free from corrosion products, burrs,

surface impregnants, anodic, passivation, oxide and other surface treatments as well as other

surface contaminants. Imperfections should be removed by careful rubbing with a medium or

fine abrasive paper or cloth, while being careful not to destroy the physical dimensions and

flatness of the surface. The surface should then be wiped with cheesecloth or lens tissue

moistened with acetone. Cotton tipped applicators should not be used. The surface should be

allowed to dry completely before the primer or bonding material is applied.

PREPARATION OF PRIMER

The base resin and curing agent should be vigorously stirred or better yet agitated for one hour

to disperse any solids. One part BY VOLUME of the curing agent should be added to an equal

volume of the base, and the two components thoroughly mixed. The mixture should be

allowed to stand for one half hour before it is used. During this time it should be capped.

Any unused primer should be discarded no longer than eight hours after mixing (four hours for

best results).

APPLICATION OF PRIMER

The primer should be applied as described below to an area which is at least as large as the

cured bond area shown on the engineering drawing. The primer should be applied within two

hours after cleaning and the primed surface should be bonded within 30 days after application.