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Trial Number 3

Trial Purpose:

To evaluate four paint removers using a manual removal of paint and varnish from painted wooden coupons.

Date Run:

07/15/2015

Experiment Procedure:

Twelve pre-weighted wooden coupons were double coated with the supplied paint or varnish. Once dried, a second weight was recorded to determine the amount of paint added to the coupon. The cleaner was applied to each coupon with a brush and then cleaned using a 3 m Heavy Duty Scour Pad.  Each coupon was scraped firmly ten times every five minutes for a 30-minute period.  Then by visual and manual comparison efficiency were placed.

Trial Results:

Cleaner Dirty Weight Clean Weight % Removal
Nature Sol 100  0.1190   -0.1509  -1.27
-0.1938  -0.0209 0.11
0.4473 -0.0317  -0.07
EP-921 -0.0420 -1.0986 26.16
-0.1148 -0.3655  3.18
0.3454 -0.2382 -0.69
Bio-Solv 0.2217 0.2840 1.28
-0.0294 0.0095 -0.32
0.8010 -0.4589 -0.57
Soy Gold 1000 0.2684 -2.8769 -10.72
2.2256 -2.2438 -1.00
0.8212 -0.9771 1.19

Visual Ranking

Cleaner 5 min 10 min 15 min 20 min 25 min 30 min
Nature Sol 100 3 2 2 1.5 1 1
EP-921 5 5 5 5 4.5 3
Bio-Solv 5 4.5 4 4 4 4
Soy Gold 1000 5 4.5 4.5 4.5 4 2

Success Rating:

Preliminary compatibility tests on substrate coupons encouraging for at least one cleaning chemistry. More in-depth laboratory testing necessary.

Conclusion:

Overall, Biosolve was the best paint stripper for removing all three paint contaminants. EP 921 would be another good option to look further into as a Methylene Chloride alternative on other types of paints. Future testing should include these two paint strippers.

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