The MIIS Eprints Archive

Acid Polishing of Lead Crystal Glass

Fowler, Andrew and Gonzalez, Maria and Hegarty, Alan and King, John and Ockendon, Hilary and O’Brien, Stephen and Robinson, Marguerite and Shishkin, G. I. and Tocher, David and Wang, Qi (2008) Acid Polishing of Lead Crystal Glass. [Study Group Report]



The industrial partner manufactures high quality lead crystal glassware. The cutting of decorative features in the glass damages the surface and the cuts are optically opaque; to restore transparency, the glass is polished in a solution of hydrofluoric (HF) and sulphuric acid (H2 SO4 .) The polishing process comprises three stages:
1. immersion in a polishing tank containing acid;
2. rinsing in a tank containing water; and
3. settlement of the solid reaction products in a settlement tank.
The manufacturer hopes to optimise its polishing process to
• minimise the health/environmental impact of the process;
• maximise throughput;
• maintain the sharpness of the cut edges while still polishing to an acceptable level of transparency.

The study group was asked to focus on modelling three aspects of the process:
• the chemical reactions involved in the etching at the glass-acid solution interface;
• the removal of reaction products in the settlement tank;
• flow within the polishing tank.

Item Type:Study Group Report
Problem Sectors:Materials
Study Groups:European Study Group with Industry > ESGI 62 (Limerick, Ireland, Jan 21-25, 2008)
ID Code:262
Deposited By: Dr Kamel Bentahar
Deposited On:22 Oct 2009 09:02
Last Modified:29 May 2015 19:52

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