REMOVING INK SPOTS1 STANLEY C. BUNCE C
Lehigh University, Bethlehem, Pennsylvania
THE effectiveness of chemical reagents in the removal of two-week-old spots of different kinds of inks was investigated. Results with the best of these reagents are indicated in the table. For the "blue-black" inks, the reagents used remove only the temporary dye, not the iron tannate. For these, the best and most common of the permanent inks, i t is suggested that permanganate be used to remove the temporary dye. This should be followed with oxalic acid (10 per cent) to discharge the permanganate and dissolve the iron tannate. Washing with weak ammonium hydroxide will insure against harmful effects of the acid reagents on the fabric or paper.
Pwmonml
blue Reogrnl dyerluff Sodi"Di pyrepho~phate (saturated) Sodium hydrosulfite (10%) Gwd Sodium bisulfife (10%) Cad sodium hypochlorite Good (10%) Sodium perborate (5%) Complete AEid permanganate Complete
Pwmonrnl red dyerluff
'
Tem*ornry dye of
block
dyerluff
Logwood
blucdlod Good
Cmd complete
Complete
Complete
Complete
Complete
Complete
~ood
Complete
Complete
Gad
Complete
Complete
G O O ~
God
,,n4., \." ,",
A C ; ~permanganafe
complete
complete
1Theser~ultsareahstractedfromareportofworkperfomedat (5%) Lehigh University under the direction of Doctor Robert D. Bil- ~ e i dpermanlinger. ganate
Complete
Good
-
Tr*r ,of-ni P~rmnncnl
