Specifications

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Refractory Investments

For Direct-Firing Ceramics

V.H.T. Investment

Refractory Investment for Porcelains

with High Thermal Expansion

• High strength allows multiple rings

• Smooth, hard surfaces for

superior t

• Controlled expansion for perfect

tting veneers, inlays/onlays or

jackets

• Compatible with porcelains with

CTE of 14.0 or higher

• Recommended liquid: Special

Liquid Concentrate. Sold separately

Polyvest

Refractory investment for porcelains

with medium range thermal

expansion

• Fine-grained material for smooth

surfaces and accurate reproduction

• High strength allows multiple rings

– resists fractures and abrasions

• Compatible with porcelains with

CTE of 13.9 or lower

• Recommended liquid: Special

Liquid Concentrate – Plus. Sold

separately

Physical Properties

V.H.T. Polyvest

Color Blue White

Liquid/Powder Ratio 19 mL/100 g 22 mL/100 g

Working Time 4–5 minutes 2 minutes

Setting Expansion 0.30% 0.80%

Thermal Expansion

500° C (932° F), 2nd ring 0.80% 0.65%

Compressive Strength (1 hour) 2,500 psi (17 MPa) 6,000 psi (42 MPa)

Compressive Strength (after ring) 4,800 psi (34 MPa) 6,500 psi (46 MPa)

Maximum Furnace Temperature 1,200° C (2,200° F) 1,200° C (2,200° F)

Item No. Description

V.H.T. INDUSTRIAL INVESTMENT

Recommended Liquid: Special Liquid Concentrate

(Sold Separately). See pg. 5 for liquid requirements.

Preweighed Envelopes

18474 24 - 60 g Package

POLYVEST REFRACTORY DIE MATERIAL

Recommended Liquid: Special Liquid Concentrate Plus

(Sold Separately). See pg. 7 for liquid requirements.

Preweighed Envelopes

24930 24 - 60 g Package