Document xznvg9xnNOzgQpaZBw2X5ooOJ

Serial Xo. SM6-44 Copy No. 1 am * #1 - Hnuerieal File 2 Reaaareh Offiee (2224) J * UUnf file (2224) 4 - #10 Suildlng m 5 *# 6 * * 4 Ieporial Chwdeal Industrie*, Lt f * e @. * w* ?<! Speagamaii. Neeark 20 Estra BBMRK PUS* nmm c o l o r r es ear c h r epo r t Progreae Report Title* LIKE KBS 6 - SEMI-fORKS GEYSLOPMSKT K-2326 and RT-$60*Dt K-2373 Ported Covered* January 1945 - July 1944* Submitted By* II. C. Taber Approved fey ft Bate Submitted* 7/25/46 Bate Earned* 7/31/46 N39998 The lake Red 8 pigment (Ba-roslaated pigment of is * relatively aheap red in a* nett rang* ImUn w UtiuOi and Ink* Red C. It it similar tinctorially t* *wks Rad 6 pigments* * K-21<85, m developed in the laboratory, gave reasonably consistent laboratory products of the bright red, etreng typo wanted, Attempts bod been mad* to stabilise ibis eeler os regards moisture sensitivity but no satisfactory nethod bos boon developed* The pignent ie rotber bygrosoopio and upon storage in bponiiect atmospheres rapidly drifts light, soak* and yellow* The present report disoussos semi-works varieblo otudios end includes tho formula end operating notes for th# final sesd-works proeees HT-56O-B, K-2373* Previous reports* S8-45-40 Hew Barium "Reel* from the Bye Para-Toluldlne * Mete Bulfmie Acid -* Bate Maphthol KH-45-75 WM64 - M Bed (K-21+5) Variable Study and Attested Moisture Stabilisation* Twenty-eight semi-works strikes here been mode* After 2 satisfactory batches, there followed a series ef batches all of wbioh were ysllow and weak* A number of laboratory development series run in eeajunotien with the Seed* Tories manufacture indicated that the light weak batches obtained were due te over-development rather than under'development ef the pignent* A nuabor of development oenditioae were than tried and the optimum development temperature and `time was determined te he, in the Bond-Works, a boil for from 5 te 10* * Bailing longer than 10* min usually caused tho pigment to go light and weak* Boiling loss than 5* gave tee dark a aosstone end yellow tint* Making variables* such as pH, tine end smnmer ef eotqpling, striking, or egging the dye, end quality ef the RHU* had little offset on stability ef the pignent either toward over-development or toward moisture stability* The partial stability tesard moisture observed for lots ?8|l and 7883 was never again obtained. K-2326, the formula developed in tho Seed-Works, differs from K-2145 by limiting development at a bell te 10 minutes and by stapling in the orthodox manner rather then sspleying "acid" coupling* BT-*tG-, K-2373 includes s 2 1/2% sodium metasilieate treatment for improvement of flow* A espy is included with this report* Development time has proved te be the chief fester effecting tinc torial properties ef lake 1led 8* Bader development gives n very dark maestoso and very wash, very yellow tint whereas over-development gives n very light DUP050150444 -2- yellow maestoso with n^t Uu tint* Unfortunately the optimum period of development time it very brief! nor it the time always tho ttae* Usually however, maximum strength it obtained at 5 minutes boil tad strength dee* net fall off appreciably until after 10*12 minutes boil. the K-2145 formula developed la the laboratory called for a 20 minute boil but la the seal-works this alaest alaayt vetaltod in ever-development la the oaaafatttaro of let 8515 tad all subsequent batches samples were taken at Intervals daring the development periods and a considerable amount of information gathered* It it summarised Inthe chart ea the felletiag page, la the laboratory, the curves are much broader at the peak than la the semi-works. A 20 min* development period one used for beet depth la the lab. Efforts to broaden the peak la the eeai**erk by making alterations in the formula have failed for the meet part. Aging of the dye*refeiaate slurry two hours or longer showed a slight indleatlen to improve stability m boiling. Development under a bell widens the ourve somewhat bat .* strength It approximately % leas aad tint is somewhat mere yellow. The K-2145 formula called for an mold coupling. *he orthodox . alkaline, under surface coupling has proved Just ae satisfactory tlncterially aad Is a simpler procedure. Hetinctorial offsets-resulted froatheehaageim---------procedure. Batch Bias 27# te 13#* Mo problem* were encountered la increasing batch also from PTMBA C--llt* The bast grades of H*59 (crude FTMSi) mads OK material from uaflltered PTMBi. However, in most of the work using N-5*9 filtration was used since it ie still uncertain what tbs quality of future shipment of crude rraSA will be like. The filtered materiel appears to make satisfactory color, lie effect of PTBSA quality m either boiling stability or moisture sensitivity ha* been noticed. Lake Red S flushes into vashdeft very readily using Turkey Red Oil as flushing assistant. Heat is necessary te remove the last traces of moisture which mast net be present if the proper depth aad strength aad tint is to be Detained. One# tbs defeired depth is reached continued mixing action has little effect on masstene or tint. Except for the first two batches ef >2145 made in the Seed-Works, all batches have been very sensitive te moisture at 7# humidity. The pigments pieg up about 2.00# moisture end besoms light in , wk mad v ywl la tint. Me DUP050150445 variation have boon found to emtrol thie aadoairablo jrporty of Lake Sod 8. boko Rod 8 lako without trootaoHi bm wry little flow* Treataeat of the plgneut with oodlm aetaollieate isjarevef flaw appreciably* It bao not bom ascertained whether fluehed lako ms bo oaocosofully treated* A 420 lb* emi-worke sis of lete 8558, 8592, 8688, 8782, 8707* 883? osd 8843 mo sodo* Tkio treated with t l/m f eodius aetaoilioate boo bom tot up o K oosfplOf K-8373. *w pounds of tbo ads without neta odlioato treatneat woe oet up aa the K*83g6 maple* A ohort io included wMoh ossoarimo the important infenmtlea about each eeni-worko lot* D88 44-18 R*S* 1127*58, 59* 41, 42, 43, 45, and 48, H*B. 119*03-14, 18-20, 22, 23, 25, 24, 40 aad 41* N.B. 1143l-2* DUP050150446