Neutralizing

The final step in surface preparation is to bring the surface condition back to an optimum alkalinity of 7.0 to 7.5 pH, which is suitable for all Micro-Measurements strain gage adhesive systems. This should be done by liberally applying M-Prep Neutralizer 5A to the cleaned surface, and scrubbing the surface with a clean cotton-tipped applicator . The cleaned surface should be kept completely wet with Neutralizer 5A throughout this operation. When neutralized, the surface should be dried by wiping through the cleaned area with a single slow stroke of a clean GSP-1 gauze sponge . With a fresh sponge, a single stroke should then be made in the opposite direction, beginning with the cleaned area to avoid recontamination from the uncleaned boundary.

Remove Neutralizer With Gauze Sponge

From VideoTech Library VS-101

If the foregoing instructions are followed precisely, the surface is now properly prepared for gage bonding, and the gage or gages should be installed as soon as possible.

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