Moulding & casting material

Use this image

Can I reuse this image without permission? Yes

Object images on the Ingenium Collection’s portal have the following Creative Commons license:

ATTRIBUTE THIS IMAGE

Ingenium, 1980.0955.001
Permalink:

Ingenium is releasing this image under the Creative Commons licensing framework, and encourages downloading and reuse for non-commercial purposes. Please acknowledge Ingenium and cite the artifact number.

DOWNLOAD IMAGE

PURCHASE THIS IMAGE

This image is free for non-commercial use.

For commercial use, please consult our Reproduction Fees and contact us to purchase the image.

OBJECT TYPE: N/A
DATE: Unknown
ARTIFACT NUMBER: 1980.0955.001

MANUFACTURER: Kerr Dental Mfg. Co.
MODEL: Cristobalite Investment
LOCATION: Detroit, Michigan, United States of America

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 1
AKA: N/A
Patents: N/A
General Description: Metal container with gypsum (possible) investment compound.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length: 18.5 cm
Width: 13.2 cm
Height: 26.8 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Medical Technology
Category: Dentistry
Sub-Category: N/A

Manufacturer

AKA: Kerr
Country: United States of America
State/Province: Michigan
City: Detroit

Context

Country: United States of America
State/Province: Vermont
Period: Unknown
Canada: Unknown
Function: Used to mold and cast models and dies.
Technical: Part of a collection of chemicals and equipment used in the manufacture of dental fillings, moulds, bridgework and inlays.
Area Notes: Unknown

Details

Markings: Printed on the proper front and proper back: "KERR/ REG. U.S. PAT. OFF./ CRISTOBALITE/ INVESTMENT/ U.S.A. PATENT No. 1,932,202/ for INLAYS/ This Investment has sufficient expansion to/ compensate for all shrinkages of gold and wax/ encountered in casting inlays./ Manufactured in U.S.A. by/ KERR DENTAL MFG. COMPANY/ DETROIT, MICH., U.S.A./ 10 lbs. Net/ 4.54 Kg. Net"/ Printed on the proper left side: "ADVANTAGES OF/ KERR/ REG. U.S. PAT. OFF./ CRISTOBALITE/ INVESTMENT/ REG. U.S. PAT. OFF./ for INLAYS/ Cristobalite Inlay Investment obtains its ex-/ pansion from its principal ingredient Cristo-/ balite, a distinct form of silica having a/ higher expansion than any other form. This/ expansion makes it possible to produce well/ fitting inlays without recourse to wax expan-/ sion, hot water, thick mixes, or complicated/ techniques./ A single mix is used, burn-out/ may be accomplished quite rapidly and the/ Investment has adequate strength. Any/ technique may be used, but the Philips'/ Control Technique is highly recommended./ Read Enclosed Directions"/ Printed on the proper right: "PHYSICAL PROPERTIES OF/ KERR/ U.S. PAT. OFF./ CRISTOBALITE/ INVESTMENT/ U.S. PAT. OFF./ for INLAYS/ Guaranteed to meet the American Dental/ Associated Specifications No. 2 for Inlay/ Investment./ WATER-POWDER RATION: 38-42 parts of water/ to 100 parts of In-/ vestment by weight./ SETTING EXPANSION: 0.36%/ CRUSHING STRENGTH: 1500 lbs. per sq. in./ SETTING TIME: Vicat Needle - 13 Min./ Gilmore Needle -/ Initial 15 Min. - Final 22 Min./ THERMAL EXPANSION:/ 700-900 [degrees] Fahr./ 370-480 [degrees] Cent. - 1.20 %/ 1200-1800 [degrees] Fahr./ 650-980 [degrees Cent. - 1.25%"
Missing: Unknown
Finish: A brown paper covered can with black printed text and a grey metal top and bottom.
Decoration: N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Kerr Dental Mfg. Co., Moulding & casting material, Unknown Date, Artifact no. 1980.0955, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1980.0955.001/

FEEDBACK

Submit a question or comment about this artifact.