Gypsum Processing and Use
Fal-G Mansion, 35 Shri Venkateswara Colony
Visakhapatnam, 530012, INDIA
Ph: +91 891 2516411
Fax: +91 891 2517429
• For basic information on production of school writing chalks from both limestone
(calcium carbonate) and gypsum:
• For information on the pendulum clay or soft rock crusher contact the developers:
JPM Parry & Associates Ltd
Tel: +44 (0) 1384 569171
Fax: +44 (0) 1384 637753
For further information contact:
The Schumacher Centre
Rugby, Warwickshire, CV23 9QZ
Tel: +44 (0)1926 634400
Fax: +44 (0)1926 634401
The Building Advisory Service Information Network
This technical brief was originally written by Otto Ruskulis for the Appropriate Technology
magazine Volume 23/Number 4 June 1997 ATBrief No 19 and updated in March 2008.
For more information about Appropriate Technology contact:
Research Information Ltd.
222 Maylands Avenue
Hemel Hempstead, Herts.
Tel: +44 (0)20 8328 2470
Fax: +44 (0)1442 259395
This Technical Brief is possible thanks to the collaboration of DFID-UK and The Tony Bullard Trust.
Practical Action is a development charity with a difference. We know the simplest ideas can have the most
profound, life-changing effect on poor people across the world. For over 40 years, we have been working closely
with some of the world’s poorest people - using simple technology to fight poverty and transform their lives for the
better. We currently work in 15 countries in Africa, South Asia and Latin America.