Document dQz9Z4mm30kprgx90j73DxO0R

co: Dr. J.7. Hvmn rreland Houston 0. H. liar*, Jr. Oct. l$th ChiMRB PCandC Salss Auxiliaries Researoh Sovenbar 5, 1951 Maria* Taint and Vamiah Co. I gave you tha Information that wm available on the oonparlaon of Simoltth HiOpacity Li-thq'on* and rfcrnolith 20L and PermolLth kOT in aty letter of October l5th, which oroa*d in the Bail with your letter of the same date. Dated on the oil absorption, it appeart that Femolith 1*0~ would be closer in body to Suaolith Hig Opaoity, fa hare now made paints 00apsrlne the prope-tles of Simolith High Opaoity and rwmollth 2QL, l*0i" and 1-320 in a flat wall paint formula containing 750# of lithopone per 100 bal lons. This is a substantial quanlty of lithopone and oertainly should bring out differences in properties. The results very definitely Indicate that froa a standpoint of oolor in paint and hiding pow r, both 201. and 1*CM are equal, if not slight ly superior to Siaolith High Opaoity, Suaolith High Opaoity shows higher low-angular sheen than either the 201. or l*GM, and definitely hig! ar than fl-320. Likawise, both the 20L and 1*0M, as well as V-320 show equal or high er bri -htnesa than Swollth High Opaoity, aa date mined ty the Refleotonieter. There appears to be no appreciable difference in the visual gloss at high anrle of incident. Results are tabulated below in the flat wall paint form ula containing 750# of lithopone per 100 gallons faint Ho. 11*3 - Jf-320 i 1112 trt./c*l. Crind 13.77 1-3A H Cons. SW Cup #3 0ns Day too Thlok Storaor K.'i. 1 D. UL 96 99 lull - LtCU 11*5 " 2'JL 11*6 - Siaiollth 1635 1636 1975 13.81* 13.86 13.83 1 1-1A 1-3A 3l*.6 19.0 19.6 01* 38 7h 79 77 79 Drawdowns were made on blaok and whit* hiding power sheets and also on grey and white striped sheets. Reflectance values were m on the Hunter Refleotoaeter, and Tisual observations were mad* on the grey ni white draw- dows. ill drawdowns were at .005" fil* thickness. Results were as follows: 0007-SWP-041H17 N23282 Ur. 0. H. Clark, Jr. -2- No t ember 5 1951 . alnt lioi "eflsotanos Value* Contrast Katie ll3 - -320 IUa - 1.0. 1U5 - 20L ll|6 - tjnolith 87.35 83.30 83.55 87.8 brightness Visual Obs! ration Thlte- Lo* Ang. hiding ness Cheen .nror 39.05 88.75 88.55 38.0 2nd Uth let 3rd olose. 1st close. 2nd aloes. 3rd 1st poorest. Distlnctl'' 2nd lit 1st 3rd It appears fro* our test in this fomula that slthsr Fernollth 2d, or LiOW should be astlafaotory for * natch for Suno)ith High Opacity Lithopone. I to il'i r. coonend that you (tick with the Ferae!ith UOH since this ! the one that we originally reooanded and ahould sloe you,nonaally, ly better sheen, equal hiding nowa and oolor. HoweTor, if they find that the conalstonoy rure sllijhtly toe hi#) for then, then I wo-ild reoonaend the 7ernollth. 2 CL. < JL in the Tint paint we tested la does ahew eloser consistmy to Vcnollth High Opaolty. 0'-' :af JT? JTR Z. E. Aden a Mineral Frodusts Laboratory 0007-SWP-043818 0007-SWP-000127168