BALL CLAY COMPARISON CHART

Typical Analyses	TWVA	HYPLAS	HVAR	HYMOD
SiO2 %	52	71	59.6	54
TiO2 %	1.1	1.6	1.4	1.2
Al2O3 %	31.5	18.5	27.1	29
Fe2O3 %	1	0.8	0.9	2.3
CaO %	0.2	0.1	0.1	0.3
MgO %	0.4	0.3	0.3	0.4
K2O %	2.3	1.9	2.7	3.1
Na2O %	0.3	0.3	0.4	0.5
L.O.I. @1000C %	11.3	5.3	7.5	8.5
Carbon %	1.6	0.2	—	0.2
H2O Moisture Content %	19.5	—	15.7	—

DISCLAIMER Information correct Apr 17. This product information is indicative only and does not constitute a specification

Health & Safety & Disposal

When handling powdered ceramic oxides in the UK, you must wear an FFP3/P2 face mask and nitrile gloves to prevent inhalation and skin contact.
Wear a wipeable apron, polyester overalls, or similar. Clean or wash frequently.
Always clean your studio with a wet sponge rather than sweeping to stop dust from becoming airborne.
When preparing glazes, add the dry material to water, not vice-versa, to minimise dust formation.
Do not allow eating and drinking in the studio and thoroughly wash hands when leaving.
Never eat, drink, or apply cosmetics in areas where clay or glazes are handled.
Ensure emergency eye-washing facilities are available in the room.
Review official guidelines regarding studio ventilation and chemical management routinely.

Ball clay in its moist or wet state is generally classified as non-hazardous in the UK. However, dry ball clay dust carries the specific hazard code H373 ("May cause damage to lungs through prolonged or repeated exposure if inhaled"). This is due to the presence of respirable crystalline silica (quartz).

Dispose of as normal industrial waste, in accordance with local/regional/national/international regulations.

Customer Reviews

By Caya Edwards on 30th December 2025

"Bath potters is the best potters supplier I have come across. Always friendly and helpful and great products. I use this hyplas 71 ball clay to make slips and I have found it works on all the clay bodies and temperatures that I have tried terracotta to stoneware."