EP 0981598 A1 20000301 - PROCESS FOR REMOVING TARNISH FROM TARNISHED SILVERWARE
Title (en)
PROCESS FOR REMOVING TARNISH FROM TARNISHED SILVERWARE
Title (de)
VERFAHREN ZUM ENTFERNEN DES BESCHLAGS VON ANGELAUFENEM SILBER
Title (fr)
PROCEDE ANTI-TERNISSANT POUR L'ARGENTERIE TERNIE
Publication
Application
Priority
- GB 9709575 A 19970513
- US 9809520 W 19980513
Abstract (en)
[origin: GB2325243A] A process for removing tarnish from tarnished silverware comprising contacting the tarnish silverware with an anti-tarnish composition in an automatic dishwasher. The anti-tarnish composition comprises an alkaline electrolyte and a metal additive which has a more negative standard redox potential than silver, measured relative to a standard hydrogen electrode at 25‹C. The metal additive may be aluminium, manganese, magnesium, iron or zinc; and the alkaline electrolyte may be an alkali metal or alkaline earth metal hydroxide, carbonate or bicarbonate, eg sodium hydroxide. In addition builder compounds and nonionic surfactants may be present.
IPC 1-7
IPC 8 full level
C11D 3/00 (2006.01); C11D 3/02 (2006.01); C11D 3/12 (2006.01); C23G 1/20 (2006.01)
CPC (source: EP)
C11D 3/0073 (2013.01); C11D 3/046 (2013.01); C11D 3/1206 (2013.01); C23G 1/20 (2013.01)
Citation (search report)
See references of WO 9851769A1
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
GB 2325243 A 19981118; GB 9709575 D0 19970702; EP 0981598 A1 20000301; WO 9851769 A1 19981119
DOCDB simple family (application)
GB 9709575 A 19970513; EP 98921088 A 19980513; US 9809520 W 19980513