QB/T 2485-2008 English PDF (QBT2485-2008)

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QB/T 2485-2008: Toilet soap
QB/T 2485-2008
LIGHT INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 71.100.40
Classification No.: Y43
Record No.: 24061-2008
Replacing QB/T 2485-2000
Toilet Soap
香皂
ISSUED ON: MARCH 12, 2008
IMPLEMENTED ON: SEPTEMBER 01, 2008
Issued by: National Development and Reform Commission of PRC
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Product Classification and Marking ... 6
4 Requirements ... 6
5 Test Methods ... 7
6 Inspection Rules ... 10
7 Marking, Packaging, Transportation, Storage, Shelf Life ... 10
Appendix A (Normative) Determination of Transparency ... 11
Appendix B (Informative) Determination of Dry Sodium Soap – Simplified
Method ... 14
Toilet Soap
1 Scope
This Standard specifies product classification, requirements, test methods, inspection
rules and marking, packaging, transportation, storage and shelf life of toilet soap.
This Standard is applicable to the fatty acid sodium soap produced by the rolling and
the cooling forming processes; and the bulk soap, medicated soap, crystal soap, etc.
mainly made of sodium fatty acid, added with other surfactants, functional additives,
and assistants.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
QB/T 2487-2008 Compound Laundry Bar Soap
QB/T 2623.1-2003 Test Methods of Soaps - Determination of Free Caustic Alkali
Content in Soaps (eqv ISO 456:1973)
QB/T 2623.2-2003 Test Methods of Soaps - Determination of Total Free Alkali
Content in Soaps (eqv ISO 684:1974)
QB/T 2623.3-2003 Test Methods of Soaps - Determination of Total Alkali Content
and Total Fatty Matter Content in Soaps (eqv ISO 685:1975)
QB/T 2623.4-2003 Test Methods of Soaps - Determination of Moisture and Volatile
Matter Content in Soaps - Oven Method (eqv ISO 672:1978)
QB/T 2623.6-2003 Test Methods of Soaps - Determination of Chloride Content in
Soaps - Titrimetric Method (eqv ISO 457:1983)
QB/T 2623.8-2003 Test Methods of Soaps - Determination of Phosphate Content
in Soaps
QB/T 2739-2005 Preparations of Standard Volumetric Solutions of General Test
into eight parts through the middle of each soap; and take two diagonal parts to cut
into thin slices or mashed; fully mixed; and put in a clean, dry, sealed container for
later-use.
5.2 Sensory indicators
5.2.1 Appearance of packaging and soap body
Visually examine by sense.
5.2.2 Odor
Inspect by smelling.
5.3 Dry sodium soap
5.3.1 Arbitration method
Test according to QB/T 2623.3-2003. The report result of dry sodium soap (%) is
expressed by an arithmetic mean to the integer unit; it shall be converted as per the
Formula (1).
……………….. (1)
If the color of the colored soap interferes with the end point of the phenolphthalein
indicator solution, thymol blue indicator solution may be used to indicate the end point.
During the measurement, 30 mL of c(1/2H2SO4) = 4mol/L sulfuric acid aqueous
solution may be added to acidify the sample. If necessary, ensure that the temperature
of the acidified solution is no lower than 70°C.
5.3.2 Simplified method
Determine according to Appendix B. The report result (%) of dry sodium soap is
expressed by an arithmetic mean to an integer unit; and it shall be converted by
Formula (1).
5.4 Total effective substance
Determine according to Appendix A of QB/T 2487-2008. The report result (%) of the
total effective substance is expressed by an arithmetic average to an integer unit; and
it shall be converted by the Formula (1).
5.5 Moisture and volatile
Determine according to QB/T 2623.4-2003. The report result (%) of moisture and
volatile is expressed by an arithmetic mean to an integer unit; and it shall be converted
When the soap is packaged in small pack, then the inspection of net content, sampling
method and determination rules shall be in accordance with the provisions of JJF 1070-
2005.
6 Inspection Rules
6.1 Inspection rules shall be in accordance with the provisions of QB/T 2951.
6.2 The dry sodium soap or total effective substance shall be determined according to
the product type indicated on the packaging; when the product type is not indicated on
the packaging, it shall be determined according to "Type-I, dry sodium soap content
≥83%".
6.3 The exit-factory inspection items are 4.1, 4.3 and Table 1 in 4.2, which contains the
content of dry sodium soap content or the total effective substance content, and the
free caustic alkali content; it also adds transparency to transparent products.
7 Marking, Packaging, Transportation, Storage, Shelf
Life
7.1 Marking and packaging
The type of product shall be indicated on the outer packaging of the sales. Others are
in accordance with the provisions of QB/T 2952.
7.2 Transportation
The product shall be lightly loaded/unloaded during transportation to avoid sun and
rain, and it is strictly prohibited to trample and stack heavy objects on the box.
7.3 Storage
The product shall be stored in a place for anti-frost, ventilated and dry, and protected
from direct sunlight and rain. The stacking height shall be appropriate to avoid damage
to large packages.
7.4 Shelf life
Under the specified storage conditions, the product is stable for a long time, and the
shelf life may not be marked; if the product meets the requirements of this standard
can only be guaranteed within two years, the shelf life shall be marked.
nicks, and no cracks as a daily whiteboard for measuring whiteness. The working
whiteboard shall be calibrated by a standard whiteboard every month. The working
whiteboard shall be stored in a desiccator in a dark place. If it is contaminated, it must
be wiped clean with velvet cloth or absorbent cotton dipped in absolute ethanol. Then
put it in a drying oven and bake at 105°C ~ 110°C for 30min; take it out; put it in a
desiccator and cool to room temperature; calibrate it with a standard whiteboard; or
process according to the provisions in the instruction manual of the whiteness meter.
A.3.3 Requirements for the whiteness meter
A whiteness meter capable of measuring the transparency of a sample. The optical
geometrical condition of the instrument is diffuse/o-geometry (d/o) or o-
geometry/diffuse (o/d). The light source of the instrument is a D65 light source. The
reading accuracy of the instrument requires one digit after the decimal point. The
stability of the instrument indicates, after start-up and preheating, the reading drift is
no greater than 0.5 every 30min. The accuracy of the instrument shall meet the
requirements of Level-2 or above in the grading standards of the whiteness meter
verification procedure.
NOTE: DN-B whiteness meter is applicable.
A.4 Test procedure
A.4.1 Preparation of test soap tablets
Cut the sample into slices with a thickness of (6.50±0.15) mm; and insert it into the
compression mold to prepare for measurement.
When the monitoring transparency is abnormal in winter, the soap sample may be
placed to return to room temperature (≥18 °C) for 24h or placed in a 25°C thermostat
...