Time Alkali Lithium hydroxide Sodium hydroxide Potassium hydroxide 0.1N 0.5N 1N 2N 0.1N 0.5N 1N 2N 0.1N 0.5N 1N 2N 2 days 49 49 49 49 48 48 48 48 48 48 48 49 7 days 50 52 52 54 49 50 52 53 50 51 53 54 15 days 53 55 56 57 53 55 56 56 54 55 56 57 30 days 57 58 59 58 55 56 57 58 55 56 57 59  45 days 59 59 60 60 58 59 60 60 57 59 61 61 60 days 58 59 60 61 59 60 61 61 58 60 61 60

Table 2: Hardness (shore-D) testing of polyvinyl acetate-Epoxy blend foam after soaking of different alkalis at different times.