I would give 5 stars if REACTIVATED silica gel packs lasted as long as BRAND NEW. Unfortunately not, so that means that PRAGMATICALLY I can only use each pack once, especially since REACTIVATED silica packs have to be REACTIVATED again and again after a relatively short period of use. Difference in EFFICIENCY of randomly selected silica gel packs. I randomly tested 4 (out of 14) BRAND NEW silica packs. I used the following test protocol: A. Test bags 1 and 3 were placed in 2 identical sealed containers [(i) and (ii)] in which the relative humidity (RH) was maintained at 100% at an ambient temperature between 60 - 65F .B For many days, I regularly checked the color (BLUE <=> VIOLET <=> PINK) of the silica spheres in each pack. After test packs 1 and 3 went from originally 100% BLUE (BRAND NEW) to 100% ROSE (SATURATED), I REACTIVATED each pack (1 or 3) SEPARATELY in a 1200 watt (MW) microwave oven for the number of minutes ( MIN ) and at the power level % (PL%) given in the data below BEFORE the beads turn from 100% PINK back to 100% BLUE.D. I then repeated A. and B. above with REACTIVATED beads. Test bags 2 and 4 (which served as CONTROLS), also at an ambient temperature of 60 to 65 F, were placed outdoors next to the 2 IDENTICAL sealed containers [(i) and (ii)] mentioned in A. above. . The ambient relative humidity (RH) in the test room was approximately 35-50% RH at 60-65 F. Please note that the test data in the table below shows that Package #1 lasted 13 days (DAY 13-DAY 0). , if the brand is NEW BUT ONLY 3 days (DAY 16-DAY 13) and 5 days (DAY 24-DAY 19) after the REACTIVATION of Pack #1, meaning the REACTIVATED silica packs will not be stored anywhere until then they are BRAND NEW. Note that the following test data also shows that Pack #3 lasted 83 days (DAY 83 - DAY 0) when it was BRAND NEW, BUT ONLY 21 days (DAY 104 - DAY 83) after Pack #3 was REACTIVATED , which again shows that REACTIVATED silica packs never last as long as BRAND NEW. Most importantly, note the HUGE PERFORMANCE DIFFERENCE between Pack #1 (last 13 days if BRAND NEW) and Pack #3 (last 83 days if BRAND NEW), which makes it extremely difficult to estimate how often a pack will be replaced in запечатанном ящике should be. __________________________MWDAY__PACKET#_C OLOR__PL% MINS__NOTES0_____1,2,3,4____BLUE_____-____-____BRAND NEW13____1________PINK______-____-____SATURATED13____1________BLUE_____20__18____REACTIVATED13____2________BLUE_____-____- ____CONTROL16____1________PINK______-____-____SATURATED16____2________BLUE______-___-_____CONTROL19____1________PINK______- ___-_____SATURATED19____1________BLUE_____30__17____REACTIVATED19____2________PURPLE___- ___-_____CONTROL24____1________PINK______-____- ____SATURATED24____2________PURPLE___-____ -_____CONTROL= === ===================================83____3_________ PINK______- ____-____ INTENSIVE83____3________BLUE_____30___8____REACTIVATED83____4________BLUE __ ___- ____ -______ CONTROL104___3_________ PINK______-____-____ SATURATED104___4______50% BLUE___- ____-____ CONTROL
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