▁Th ess al on iki ▁Category : Comm un ist ▁Party ▁of ▁Greece ▁polit icians ▁Category : B ul gar ian ▁em igr ants ▁to ▁Israel ▁Category : G reek ▁em igr ants ▁to ▁Israel ▁Category : J ew ish ▁concentration ▁camp ▁surv iv ors ▁Category : Univers ity ▁of ▁Bel grade ▁Fac ulty ▁of ▁Law ▁al umn i ▁Category : 2 0 th - century ▁Se ph ardi ▁Jews ▁Category : J ew s ▁of ▁the ▁Ott oman ▁Empire ▁Category : Se ph ardi ▁social ists <0x0A> </s> ▁RA - 4 ▁is ▁K od ak ' s ▁propriet ary ▁name ▁for ▁the ▁chemical ▁process ▁most ▁commonly ▁used ▁to ▁make ▁color ▁phot ographic ▁prints . ▁It ▁is ▁used ▁for ▁both ▁digital ▁printer s ▁of ▁the ▁types ▁most ▁common ▁today ▁in ▁photo ▁l abs ▁and ▁drug ▁stores , ▁and ▁for ▁prints ▁made ▁with ▁older - type ▁optical ▁en larg ers ▁and ▁manual ▁processing . ▁ ▁More ▁specifically , ▁common ▁color ▁phot ographic ▁paper ▁is ▁carefully ▁exposed ▁to ▁form ▁a ▁lat ent ▁image ▁of ▁the ▁picture , ▁and ▁then ▁the ▁paper ▁is ▁run ▁through ▁the ▁series ▁of ▁chemical s ▁that ▁together ▁compr ise ▁the ▁RA - 4 ▁process ▁to ▁convert ▁the ▁lat ent ▁image ▁into ▁the ▁final ▁print . ▁ ▁RA - 4 ▁uses ▁Color ▁Develop ing ▁Agent ▁ 3 , ▁in ▁combination ▁with ▁color ▁cou pl ers ▁in ▁the ▁em ulsion ▁to ▁generate ▁color ▁d yes . ▁ ▁RA - 4 ▁is ▁a ▁standard ized ▁chrom ogen ic ▁process ▁used ▁world wide ▁to ▁make