ISO 6330 Section 9.3 - Selection of ballast
This section of the standard states that when testing synthetic products or synthetic blends, either Type II or Type III can be used.
- Type II ballast / makeweights: 50% Cotton / 50% Polyester
- Type III ballast / makeweights: 100% Polyester
James Heal offer 100% Polyester Type lII ballast /makeweights for these tests, as this is a much more economical and durable product.
Type l 100% cotton ballast is also available from James Heal.
A PDF version of this FAQ is available for reference.