1. Lay out the composite specimen smooth in a flat bottomed dish and cover with the solution. Thoroughly wet one composite specimen in the alkaline solution at a liquor ratio of 50:1 and allow it to remain in the solution for 30 minutes. Press and move it from time to time to ensure good and uniform penetration of the liquor.

2. After this time interval pour off the solutions and wipe the excess liquor off the specimen by using two glass rods.

3. Place the composite specimen between two of the acrylic plates which are placed on the frame of the perspirometer (referring to figures 1 and 2). Remember to use one frame for acid solutions and one frame for alkali solutions.

4. Repeat this procedure for all specimens required.

5. After application of the loading weight(s), tighten the nuts on the top clamping plate and remove both the loading block and the extra weight (if used).

6. Pour off any excess liquor.

7. Place each Perspiration Tester containing the specimens in an oven for 4 hours at 37℃ +-2℃.

8. Open out each specimen by breaking the stitching on one of the shorter sides.

9. Dry the specimen in the air at a temperature not exceeding 60C with the two or three parts in contact only at the line of stitching.

AVENO Machine Recommend:

AC08 Perspiration Tester

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