1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23004-3 SANS 630:2009Edition 3.2SOUTH AFRICAN NATIONAL STANDARD Decorative high gloss enamel paints Published by SABS Standards Division 1
4、 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 630:2009 Edition 3.2 Table of changes Change No. Date Scope Amdt 1 2004 Amended to change the designation of SABS standards to SANS standards and to update normative reference
5、s. Amdt 2 2009 Amended to correct an error on the contents page, to change the requirements for hiding power and to delete the table containing wet film thicknesses. Foreword This South African standard was approved by National Committee SABS SC 35C, Paints and varnishes Solvent-based decorative pai
6、nts, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in October 2009. This document supersedes SANS 630:2004 (edition 3.1). A vertical line in the margin shows where the text has been technically modified
7、by amendment No. 2. Annexes A and B form an integral part of this standard. Annexes C and D are for information only. SANS 630:2009 Edition 3.2 1 Contents Page Foreword 1 Scope . 3 2 Normative references . 3 3 Definitions 4 4 Requirements . 4 5 Methods of test 8 6 Packing and marking . 12 Annex A (n
8、ormative) Notes to purchasers 13 Annex B (normative) Sampling and compliance with this standard 13 Annex C (informative) Quality verification of high gloss enamel paints 14 Amdt 2 Annex D (informative) Alternative method for determination of colour change 14 Bibliography 15 SANS 630:2009 Edition 3.2
9、 2 This page is intentionally left blank. SANS 630:2009 Edition 3.2 3 Decorative high gloss enamel paints 1 Scope This standard specifies the requirements for two grades of air-drying gloss enamel paints for use on suitably primed and uncoated steel, wood, masonry, hard board, compressed fibre board
10、 and similar materials used in the construction and finishing of buildings. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this standard. All standards are subject to revision, and since any reference to a standard is
11、 deemed to be a reference to the latest edition of that standard, parties to agreements based on this standard are encouraged to take steps to ensure the use of the most recent editions of the standards indicated below. Information on currently valid national and international standards can be obtai
12、ned from the SABS Standards Division. BS 6923, Method for calculation of small colour differences. ISO 11341, Paints and varnishes Artificial weathering and exposure to artificial radiation Exposure to filtered xenon-arc radiation. ISO 11507, Paints and varnishes Exposure of coatings to artificial w
13、eathering Exposure to fluorescent UV and water. SANS 174/ISO 1513, Paints and varnishes Examination and preparation of samples for testing. SANS 175/ISO 1514, Paints and varnishes Standard panels for testing. SANS 176/ISO 1517, Paints and varnishes Surface-drying test Ballotini method. SANS 177/ISO
14、1519, Paints and varnishes Bend test (cylindrical mandrel). SANS 552, Paint-rollers including handle-frames and refills. Amdt 1 SANS 1091, National colour standard. SANS 2813/ISO 2813 (SABS ISO 2813), Paints and varnishes Determination of specular gloss of non-metallic paint films at 20, 60 and 85.
15、SANS 2814/ISO 2814, Paints and varnishes Comparison of contrast ratio (hiding power) of paints of the same type and colour. SANS 630:2009 Edition 3.2 4 SANS 3270/ISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing. SANS 3668/ISO 3668, Paint
16、s and varnishes Visual comparison of the colours of paints. SANS 4628-4/ISO 4628-4, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size defects and of intensity of uniform changes in appearance Part 4: Assessment of degree of cracking. SANS 4628-5/ISO 4628-5,
17、Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects Part 5: Assessment of degree of flaking. SANS 4628-6/ISO 4628-6, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects Part 6: Assessment of degree
18、of chalking by tape method. SANS 5125, Paints and varnishes Determination of viscosity by means of an efflux cup. SANS 5148, Paints and varnishes Determination of through-dry state and through-dry time. SANS 5167, Paints and varnishes Determination of resistance to cold water. SANS 5464, Paints and
19、varnishes Wet hiding power (brush-out method). SANS 6259, Paints and varnishes Determination of brush and roller application properties. SANS 7724-1/ISO 7724-1, Paints and varnishes Colorimetry Part 1: Principles. SANS 7724-2/ISO 7724-2, Paints and varnishes Colorimetry Part 2: Colour measurement. S
20、ANS 7724-3/ISO 7724-3, Paints and varnishes Colorimetry Part 3: Calculation of colour differences. SANS 15528/ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling. Amdt 1 3 Definitions For the purposes of this standard, the following definitions shall apply: 3.1 reflectiv
21、ity the reflectance of a paint film of such a thickness that a further increase of film thickness gives no change in reflectance 3.2 standard atmosphere an enclosed atmosphere that complies with standard conditions as defined in SANS 3270 4 Requirements 4.1 Grades An enamel shall be one of the follo
22、wing grades, as required (see annex A): a) grade 1: high hiding; and b) grade 2: regular hiding. SANS 630:2009 Edition 3.2 5 4.2 Condition in the container When the paint from a newly opened container is examined in accordance with SANS 174, it shall be free from lumps, loose skins, extraneous matte
23、r and colour separation. If any settlement is observed, the paint shall be capable of being readily redispersed to a smooth homogenous state by using a palette knife. 4.3 Storage stability If stored in accordance with 5.4 and then examined in accordance with SANS 174, the paint shall show no liverin
24、g and no hard or dry settlement. The paint shall be capable of easy and rapid redispersion to a smooth homogeneous state. The paint shall not contain any skin. 4.4 Application properties 4.4.1 Brush application When applied to a steel panel, of size at least 300 mm x 300 mm, and tested in accordance
25、 with SANS 6259, the unthinned paint shall brush without excessive drag. The paint shall join without lapmarks after drying for 5 min. The dry paint film shall be free from flotation, sag or ciss marks. 4.4.2 Roller application When the paint is applied with a mohair roller, that complies with the r
26、equirements of SANS 552, to a steel panel, of size at least 500 mm x 500 mm, and is tested in accordance with SANS 6259, the unthinned paint shall roll without perceptible drag. The paint shall flow well, shall spread without foaming and ribbing, and shall join without lapmarks after drying for 5 mi
27、n. Amdt 1 The paint film shall have an even, level surface, free from flotation or pinholes, sag or ciss marks or any other film defect. 4.4.3 Reducibility with mineral turpentine, and spray application 4.4.3.1 When tested in accordance with 5.5.1, the paint shall mix readily with the mineral turpen
28、tine to a smooth homogenous state and shall show no incompatibility after the standing period or film defects on panel with flowed-out paint. 4.4.3.2 A paint that is recommended for spraying shall, when tested in accordance with 5.5.2, spray without spattering and shall show no flotation and no tend
29、ency to sag, run or creep. The paint shall show no tendency to produce an “orange peel“ effect and the second coat shall join well with the first coat after drying for 5 min. The dry paint film shall be an even, level film free from flotation or pinholes, sag or ciss marks, orange peel or any other
30、film defect. 4.4.4 Recoating properties When the paint is overcoated in accordance with 5.6, there shall be no ciss marks or lifting of the first coat. The hard dry time of the second coat shall not exceed 24 h and the 20 specular gloss of grade 1 enamels shall be at least 75 and the gloss of grade
31、2 enamels shall be at least 70. SANS 630:2009 Edition 3.2 6 4.5 Drying time 4.5.1 Surface dry time When the paint is applied with an adjustable film applicator (see 5.3) to a glass panel (see 5.2.3) and is then tested in accordance with SANS 176, the surface-dry time shall not exceed 4 h. 4.5.2 Hard
32、 dry time When the paint is applied with an adjustable film applicator (see 5.3) to a glass panel (see 5.2.3) and is then tested in accordance with SANS 5148, the hard dry time shall not exceed 16 h. 4.6 Hiding power When tested in accordance with SANS 5464, grade 1 white paint shall have a wet hidi
33、ng power of 10,7 m2/L min, and grade 2 white paint shall have a wet hiding power of 8.2 m2/L min. The wet hiding power of paint of other colours shall be as agreed between the purchaser and supplier. Amdt 2 Table 1 Deleted by amendment No. 2. Amdt 2 4.7 Colour 4.7.1 When the colour of the paint is c
34、ompared visually in accordance with SANS 3668, to a standard agreed upon by the interested parties (see annex A), the colour difference rating shall not exceed 1 unit. 4.7.2 When the colour of the paint is compared instrumentally in accordance with 5.7.2, to a standard agreed upon by interested part
35、ies (see annex A), the total colour difference DECMC(see note), determined in accordance with BS 6923, shall be small enough that the a/b plot falls within the ellipsoid for the standard that is defined by the semi-axis SL, SCand SH and has unit volume tolerance. NOTE The notation DECMC, as used her
36、e and in commercially available software, corresponds to the DE defined in BS 6923, with l = c = 1 as chosen values. 4.8 Reflectance of white enamel The reflectance RWof a white enamel determined in accordance with 5.8, shall be at least 85. 4.9 20 Specular gloss 4.9.1 Initial gloss When the enamel
37、is tested in accordance with 5.9, the 20 specular gloss shall be at least 80, after 24 h drying. 4.9.2 Gloss retention When determined in accordance with 5.9, the 20 specular gloss of a grade 1 paint shall be at least 75 and the 20 specular gloss of a grade 2 paint shall be at least 70, after 7 d ag
38、ing. SANS 630:2009 Edition 3.2 7 4.10 Flexibility When the paint is tested in accordance with 5.10, the paint film shall not crack or flake or show loss of adhesion. 4.11 Resistance to cold water When the paint is tested in accordance with 5.11, the paint film shall show no blistering or wrinkling i
39、mmediately after removal from the water. After a 24 h recovery the paint shall show no perceptible film defects and the 20 specular gloss shall be at least 60. 4.12 Resistance to colour change After 168 h of continuous artificial weathering in accordance with 5.12, the paint film shall not show a co
40、lour change, equivalent to a lightness difference (L*) of more than two units for all colours, except yellow and orange, which may show a colour change equivalent to a lightness difference of not more than 4 units. 4.13 Resistance to artificial weathering When tested for 400 h in accordance with 5.1
41、3, the paint shall show no chalking, checking or cracking. The 60 specular gloss shall not be lower than 50. 4.13.1 When the colour of the paint is compared visually with the unexposed panel in accordance with SANS 3668, the colour difference rating shall not be more than the units specified in tabl
42、e 2. Table 2 Colour difference ratings permissible after artificial weathering 1 2 3 Colour rating Colour Grade 1 Grade 2 All colours except yellow, orange, red 1 2 Yellow, orange, red 2 3 4.13.2 When the colour of the paint is compared instrumentally in accordance with 5.7.2, to the unexposed panel
43、, the total colour difference DECMC, determined in accordance with BS 6923, shall be small enough that the a/b plot falls within the ellipsoid for the standard that is defined by the semi-axis SL, SCand SH and has unit volume tolerance of 2 for all colours except yellow, orange and red, and has unit
44、 volume tolerance of 3 for yellow, orange and red. 4.14 Yellowing of white paint 4.14.1 Yellowing upon exposure to artificial weathering When tested in accordance with 5.14.1, white paint shall show no difference in yellow hue after continuous exposure to artificial weathering for a period of 7 d. 4
45、.14.2 Yellowing upon exposure in the dark When tested in accordance with 5.14.2, for the periods specified in table 3, white enamels shall show no difference in yellow hue. SANS 630:2009 Edition 3.2 8 Table 3 Exposure periods to be used, for determination of yellowing 1 2 3 Grade Exposure to total d
46、arkness d Recovery period d 1 2 14 7 7 7 5 Methods of test 5.1 General NOTE 1 The sampling plan and criteria of compliance that are to be used, is given in annex B. NOTE 2 Refer to annex C regarding quality verification. 5.2 Panels 5.2.1 Steel panels, of size 70 mm x 150 mm and of thickness 0,60 mm
47、to 0,90 mm that have been solvent cleaned in accordance with SANS 175. 5.2.2 Steel panels for flexibility test, of size 70 mm x 150 mm and of thickness 0,50 mm that have been solvent cleaned in accordance with SANS 175. 5.2.3 Glass panels, of size 70 mm x 150 mm (unless otherwise specified), that ha
48、ve been solvent cleaned in accordance with SANS 175. 5.3 Application thickness Apply the enamel at a wet film thickness of 60 m to 65 m per coat, unless otherwise specified. 5.4 Storage stability Store a full closed 500 mL container, undisturbed in an upright position, at a temperature of 23 C 2 C,
49、and examine after a period of 30 d and again after a period of 12 months. Use a palette knife to examine the paint for compliance with 4.3 after the relevant storage period. 5.5 Application properties 5.5.1 Reducibility with mineral turpentine 5.5.1.1 As a thinner use mineral turpentine that contains between 12 % and 28 % (by volume) of aromatic solvent and that has a boiling range of 130 C to 200 C. 5.5.1.2 Dilute four volumes of enamel (at a temperature in the range 21 C to 32 C) with one
