Is shrinkage on the boosted rubbers inevitable?

[igorponger]

Is shrinkage on boosted rubbers inevitable?

Yes, an answer is rather in positive. This profound study by an USA rubber factory from 1940 did produced a strong evidence that some rubber materials, mostly synthetics, would eventually contract in size after having been immersed into oil compounds. No wonder the sheet of Butterfly Dignics, if treated with oils, will get dwarfish like the Magic Skin masterly depicted by Onore Balzac of France.

Dr.Fraser (2) pointed out that with commercial neoprene vulcanizates maximum swelling may be followed by a shrinkage in volume due to extraction of oily or waxy materials from the neoprene compound by the oil under test.
A marked volume contraction of the rubber species is noted in Figure 2, C, D, and E. This is particularly true of those synthetics which are least affected by oil and which contain extractable material.

FINAL NOTE
Need a shrinked, quite unplayable sheet of rubber at price of 80 USD ? All right then, go on boosting at full speed.