ASTM D4906-95(2017)

Standard Test Method for Total Solids and Ash Content in Leather Finishing Materials

SIGNIFICANCE AND USE
2.1 This test method is intended for use in determining the total solids content and the ash content of a finishing material before its use on any leather.
SCOPE
1.1 This test method covers the total solids and ash content of finishing materials.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 31-Mar-2017
• ICS: 59.140.10 - Processes and auxiliary materials
• Technical Committee: D31 - Leather
• Drafting Committee: D31.06 - Chemical Analysis

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D4906 − 95 (Reapproved 2017)
Standard Test Method for
Total Solids and Ash Content in Leather Finishing Materials
This standard is issued under the fixed designation D4906; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Procedure
1.1 This test method covers the total solids and ash content
5.1 Total Solids:
of finishing materials.
5.1.1 Place the samples, which have been weighed in
1.2 The values stated in SI units are to be regarded as platinum dishes, in the oven for 16 h at 43°C followed by 2 h
standard. No other units of measurement are included in this at 93°C. (If two ovens at different temperatures are not
available, increase the temperature in the first oven for the 2-h
standard.
heating.)
1.3 This standard does not purport to address all of the
5.1.2 Remove the dishes from the oven, place them in a
safety concerns, if any, associated with its use. It is the
desiccator for 1 h to cool to room temperature and weigh.
responsibility of the user of this standard to establish appro-
Return the dishes to the oven for 1 h at 93°C and, after cooling
priate safety and health practices and determine the applica-
in a desiccator for 1 h, weigh again.
bility of regulatory limitations prior to use.
1.4 This international standard was developed in accor- 5.1.3 If the weight loss in the 1-h drying period did not
dance with internationally recognized principles on standard- change the total solids percentage more than 0.1 %, report the
ization established in the Decision on Principles for the results. If greater than 0.1 % loss was obtained from the last
Development of International Standards, Guides and Recom- 1-h drying period, then repeat the drying until the change is
mendations issued by the World Trade Organization Technical less than 0.1 %.
Barriers to Trade (TBT) Committee.
5.2 Ash:
5.2.1 Place each platinum dish, containing the residue from
2. Significance and Use
the total solids determination, in a muffle furnace at 600°C 6
2.1 This test method is intended for use in determining the
25°C for 2 h.
total solids content and the ash content of a finishing material
5.2.2 If difficulty is encountered in completely burning off
before its use on any leather.
the carbon, leach the residue with hot water (filtering through
ashless filter paper) and further ignite this residue in the muffle
3. Apparatus
furnace.
3.1 Two Tared Platinum Dishes.
5.2.3 To the dish containing the cooled ash, add the filtrate;
3.2 Drying Oven, that operates at 43°C 6 3°C and 93°C 6
evaporate to dryness and heat for 30 min at 600°C 6 25°C. The
3°C.
product shall then be cooled in a dessicator and weighed.
3.3 Desiccator, with calcium chloride or other desiccant.
6. Calculation
3.4 Muffle Furnace, capable of maintaining temperatures of
(600°C 6 25°C). 6.1 The percent total solids of the finishing material shall be
calculated as follows:
4. Sampling
A
Total soli
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D4906 − 95 (Reapproved 2012) D4906 − 95 (Reapproved 2017)
Standard Test Method for
Total Solids and Ash Content in Leather Finishing Materials
This standard is issued under the fixed designation D4906; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the total solids and ash content of finishing materials.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Significance and Use
2.1 This test method is intended for use in determining the total solids content and the ash content of a finishing material before
its use on any leather.
3. Apparatus
3.1 Two Tared Platinum Dishes.
3.2 Drying Oven, that operates at 43°C 6 3°C and 93°C 6 3°C.
3.3 Desiccator, with calcium chloride or other desiccant.
3.4 Muffle Furnace, capable of maintaining temperatures of (600°C 6 25°C).
4. Sampling
4.1 One 5- g 5-g and one 10-g sample of the finishing material shall be weighed with accuracy to within 0.001 g.
5. Procedure
5.1 Total Solids:
5.1.1 Place the samples, which have been weighed in platinum dishes, in the oven for 16 h at 43°C followed by 2 h at 93°C.
(If two ovens at different temperatures are not available, increase the temperature in the first oven for the 2-h heating.)
5.1.2 Remove the dishes from the oven, place them in a desiccator for 1 h to cool to room temperature and weigh. Return the
dishes to the oven for 1 h at 93°C and, after cooling in a desiccator for 1 h, weigh again.
5.1.3 If the weight loss in the 1-h drying period did not change the total solids percentage more than 0.1 %, report the results.
If greater than 0.1 % loss was obtained from the last 1-h drying period, then repeat the drying until the change is less than 0.1 %.
5.2 Ash:
5.2.1 Place each platinum dish, containing the residue from the total solids determination, in a muffle furnace at 600°C 6 25°C
for 2 h.
5.2.2 If difficulty is encountered in completely burning off the carbon, leach the residue with hot water (filtering through ashless
filter paper) and further ignite this residue in the muffle furnace.
5.2.3 To the dish containing the cooled ash, add the filtrate; e
...