SIST EN ISO 1561:2000

Dental casting wax (ISO 1561:1995)

Migrated from Progress Sheet (TC Comment) (2000-07-10): Revision of EN 21561:1992.

Dentales Gußwachs (ISO 1561:1995)

In der vorliegenden Internationalen Norm werden die Typeneinteilungen, die Anforderungen für dentales Gußwachs sowie die entsprechenden Prüfverfahren festgelegt, damit die Übereinstimmung mit den Anforderungen dieser Norm festgestellt werden kann. Die vorliegende Internationale Norm gilt für dentales Gußwachs, das zur Herstellung von Wachsmodellen für festsitzenden Zahnersatz im "Wachsausschmelzverfahren" verwendet wird.

Cires dentaires (ISO 1561:1995)

Dental casting wax (ISO 1561:1995)

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1999
• Withdrawal Date: 05-Nov-2014
• ICS: 11.060.10 - Dental materials
• Technical Committee: VAZ - Healthcare
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 04-Nov-2014
• Due Date: 27-Nov-2014
• Completion Date: 06-Nov-2014
• Ref Project: EN ISO 1561:1997 - Dental casting wax (ISO 1561:1995)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 1561:2000
01-januar-2000
Dental casting wax (ISO 1561:1995)
Dental casting wax (ISO 1561:1995)
Dentales Gußwachs (ISO 1561:1995)
Cires dentaires (ISO 1561:1995)
Ta slovenski standard je istoveten z: EN ISO 1561:1997
ICS:
11.060.10 =RERWHKQLþQLPDWHULDOL Dental materials
SIST EN ISO 1561:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 1561:2000

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SIST EN ISO 1561:2000

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SIST EN ISO 1561:2000

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SIST EN ISO 1561:2000
INTERNATIONAL
ISO
STANDARD
1561
Second edition
1995-1 o-1 5
Dental casting wax
Cires den taires
Reference number
ISO 1561 :1995(E)

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SIST EN ISO 1561:2000
ISO 1561:1995(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work
of preparing International Standards is normally carried out through ISO
technical committees. Esch member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 1561 was prepared by Technical Committee
lSO/TC 106, Dentistry, Subcommittee SC 2, Prosthodontic materiak.
This second edition cancels and replaces the first edition
(ISO 1561 :1975), which has been technically revised.
Annex A of this International Standard is for information only.
0 ISO 1995
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without Permission in writing from the publisher.
I nternationa I Organization for Standardization
Case Pastal e 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland

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SIST EN ISO 1561:2000
ISO 1561:1995(E)
INTERNATIONAL STANDARD 0 ISO
Dental casting wax
4 Requirements
1 Scope
This international Standard specifies the classification
4.1 Uniformity and purity
of and requirements for dental casting wax, together
with the test methods to be employed to determine
The wax shall be uniform and free from visible foreign
compliance with these requirements.
materials.
This International Standard is applicable to dental
4.2 Size and shape
casting wax used in making Patterns in the production
of fixed prostheses restorations by the “lost-wax”
The size and shape of the wax shall be as stated by
casting technique.
the manufacturer.
NOTE 1 Specific qualitative and quantitative require-
ments for freedom from biological hazard are not included 4.3 Colour
in this International Standard. In assessing possible biologi-
cal or toxicological hazards, reference should be made to
The colour of the wax shall be as stated by the
ISO 10993-1 and lSO/TR 7405.
manufacturer.
2 Definition
4.4 Softening characteristics
For the purposes of this International Standard, the
The wax shall soften uniformly when heated, without
following definition applies.
becoming flaky. lt shall not laminate when formed into
a working mass.
2.1 casting wax: Compound consisting essentially
of natura1 waxes, resins and hydrocarbons of the
4.5 Chipping
Paraffin and microcrystalline series.
The wax shall not show appreciable chipping or flaking
3 Classification
when trimmed to a fine margin at (23 + 2) “C.
Dental casting waxes are classified according to the
4.6 Flow behaviour
flow characteristics that define their hardness as fol-
lows:
When tested in accordance with 6.2, the Sample of
the wax shall produce flow results complying with the
Type 1: Soft
requirements in table 1 for different types of wax at
Type 2: Hard
the three applicable test temperatures.

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SIST EN ISO 1561:2000
ISO 1561:1995(E)
Table 1 - Wax flow behaviour (% Change in specimen length)
Test temperatures TYPe 1 TYPe 2
Minimum
Minimum Maximum Maximum
%
“C % % %
1 ,o
30
18
37
20,o
40 50,o
45 70,o 90,o 70,o 90,o
6.2.1.2 Flow-testing instrument (see figure 1 ),
4.7 Residue on ignition
consisting of the following Parts:
The melted wax when ignited at 500 “C shall leave
- a metallic cylinder (A);
no residue in excess of 0,l % of the original mass of
the specimen, as tested in accordance with 6.3.
- a shaft having low thermal conductivity (B);
For wax having residue exceeding 0,l % original mass
- a brass plate (C);
at 500 “C ignition and designed for use with invest-
ments formulated for a burnout temperature higher
- a measuring dial gauge (D) with scale graduated in
than 700 “C, the manufacturer shall indicate on the
0,005 mm;
label the amount of residue at 500 “C. When the wax
is ignited at 500 “C, the residue shall be within 20 %
- a lack-nut screw (E).
of the manufacturer ’s stated value. Such wax shall not
leave more than 0,l % residue when ignited at
The total mass of the components A, B, C and D shall
700 “C.
be 2 kg. The cylinder (A) shall be separated a mini-
mum distance of 76 mm from the brass plate (C) by
the shaft (B). This shaft shall be of hard rubber, or a
similarly poor thermal conductor, to reduce heat loss
5 Sampling
from the specimen. The diameter of the brass plate
(C) shall be not less than 51 mm and thickness not
The method of procurement and the amount of wax
greater than 6,35 mm.
needed for testing shall be the subject of agreement
between the interested Parties.
NOTE 2 If the flow-testing instrument is robust enough
to support a measuring dial gauge and a lack-nut screw
rigidly, or the instrument is built with them incorporated
(see D and E in figure l), then a measuring dial gauge ac-
curate to 0,005 mm with a range of at least 10 mm may
6 Test methods
replace the micrometer for direct measurement.
6.2.1.3 Mould (see figure 2) consisting of a stain-
6.1 Visual inspection
less steel plate 6 mm thick, having parallel flat top and
bottom surfaces, and containing four holes each
Use visual inspection in determining compliance with
10 mm in diameter. The axes of the holes shall be
the requirements as specified in 4.1 to 4.5 and in
perpendicular to the surface of the plate. The sides
clause 7.
of the holes shall be finished smooth.
6.2.1.4 Pouring pan (see figure 3) of metal or con-
6.2 Evaluation of flow characteristics
ventional porcelain, with handle.
6.2.1 Apparatus
6.2.1.5 Cellophane or polyethylene film.
6.2.1 .l Metric micrometer. 6.2.1.6 Calibrated thermometer.

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SIST EN ISO 1561:2000
ISO 1561:1995(E)
KW
A Weight
B Shaft
C Brass plate
D Gauge
E Lock-nut screw
Figure 1 - Flow-testing instrument

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SIST EN ISO 1561:2000
0 ISO
ISO 1561:1995(E)
Dimensions in millimetres
/
I J
b
/
/
f
Figure 2 - Mould for forming flow specimens
Figure 3 - Metal pouring pan
76 mm wide and 19 mm thick, and pour the melted
6.2.2 Preparation of test specimens
wax into the mould, both mould an
...