Specifications

22
Silky-Rock
Low-Expansion Die Stone
Silky-Rock is characterized by
exceptional hardness and density
throughout, and an unusual “silky-
smooth” pouring quality that
makes it ow freely into any type
of impression. It works well with all
types of impression materials. These
properties, together with its low
setting expansion, make Silky-Rock
one of the world’s most popular die
materials.
Physical Properties
Water/Powder Ratio 23 mL/100 g
Working Time 3–6 minutes
Setting Time 10 minutes
Setting Expansion 0.09%
Compressive Strength, Wet (1 hour) 6,000 psi (41 MPa)
Compressive Strength, Dry (48 hours) 13,000 psi (90 MPa)
Item No. Description
Ivory Yellow Violet White
— 01996 01910 02070 11 kg (25 lb.) Carton
33163 33162 31755 27219 25 kg (55 lb.) Carton
Preweighed Envelopes
— 02038 01945 02100 120-70 g Package
— 02046 01953 02119 80-140 g Package
ISO TYPE 4
Hard Rock
High-Strength, High-Expansion Die Stone
Physical Properties
Water/Powder Ratio 21 mL/100 g
Working Time 6–8 minutes
Setting Time 15 minutes
Setting Expansion 0.28%
Compressive Strength,
Wet (1 hour) 7,000 psi (49 MPa)
Compressive Strength,
Dry (48 hours) 15,000 psi (104 MPa)
The material is compatible with all types of impression materials. Its high expansion
makes it especially suited for polyvinyl or polyether impression materials. This
material has a creamy and thixotropic consistency for good ow under vibration, yet it
is very stackable. Its extended working time facilitates multiple pours. The stone has a
smooth non-brittle surface so dies trim easily without chipping.
ISO TYPE 5
Item No. Description
Aqua Green Ivory
26107 32050 — 11 kg (25 lb.) Carton
26530 32069 34002 25 kg (55 lb.) Carton
Preweighed Envelopes
26565 32077 — 120-70 g Package
— 32080 — 100-140 g Package
Ivory
White
Yellow
Violet
Aqua
Green
Ivory