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Standard EN ISO 12543-6: 1998 The following applies to: laminated glass

1. Scope of the standard

This standard specifies the defects of the finished products, and the test methods for the appearance of glass when viewed through them. Particular attention has been paid to the acceptable criteria for the assessment of the field of vision. The criteria relate to the evaluation of products upon receipt.

2. Reference standards

This European Standard incorporates by dated or undated reference, requirements from other publications. These references are cited at the appropriate places in the text of the standard and the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies.

EN ISO 21543-1 Glass in building - Laminated glass and laminated safety glass - Part 1: Definitions and description of component parts

EN ISO 12543-5 Glass in building - Laminated glass and laminated safety glass - Part 5: Dimensions and edge finishing

3. Definitions

In this standard, the following definitions are used together with the definitions given in EN ISO 12543-1:

3.1 Spot Defects: These defects include opaque spots, blisters, and foreign matter.

3.2 line defects: These defects include foreign bodies and small or deep scratches.

3.3 other defects: Glass defects such as scratches, and interlayer defects such as wrinkles, shrinkage and streaks.

3.4 opaque defects: Visible defects in the laminated glass (for example - traces of tin, inclusions in the glass or interlayer).

3.5 Bubbles: Usually these are air bubbles that may be present in the glass or interlayer.

3.6 foreign bodies: Any undesirable inclusion introduced during the production of laminated glass.

3.7 minor or deep scratches: Linear damage to the outer surface of the laminated glass.

3.8 cracks: Sharp gaps or cracks through the glass from the periphery.

3.9 wrinkles: Distortion that occurs in the interlayer as visible overlaps after manufacture.

3.10 streaks due to inhomogeneity in the interlayer: Distortion in the interlayer due to defects in the manufacturing of the interlayer which become apparent after manufacture.

4. Defects in the field of view

4.1 Point defects in the field of view

During the control according to the method given in chapter 9, the presence of spot defects is allowed depending on:

- size of the defect;

- repeatability of the defect;

- the size of the glass;

- the number of panes included in the laminated glass.

This is shown in Table 1.

Defects less than 0.5mm are not taken into account.

Defects greater than 3 mm are not allowed.

NOTE: The admissibility of point defects in laminated glass does not depend on the thickness of the glass.

Defect size in mm 0,5 < d ≤ 1,0 1,0 < d ≤ 3,0
Glass size A in m2 for all sizes A ≤ 1 1 < A ≤ 2 2 < A ≤ 8 A > 8
Number of acceptable defects

2 panes

3 panes

4 panes

≥ 5 panes

Without limitation, however, defects must not be present in a cluster

















Table 1 - Acceptable point defects in the field of view

NOTE: A cluster of defects occurs when four or more defects are located <200mm apart. This distance is reduced to 180 mm for laminated glass consisting of four panes and to 100 mm for laminated glass consisting of five or more panes.

The number of tolerable defects given in Table 1 may be higher by 1 for each individual interlayer that is more than 2mm thick.

4.2 Linear defects in the field of view

When tested in accordance with the procedure described in Chapter 9, linear defects are acceptable in accordance with Table 2.

Glass area Number of length errors allowed ≥ 30 mm
≤ 5 m2 unacceptable
5 do 8 m2 1
> 8 m2 2

Table 2 - Number of acceptable defects in the field of vision.

Linear defects less than 30mm in length are acceptable.

5. Defects in the peripheral zone provided for the edging

When checking according to the method in Chapter 9, defects not exceeding 5 mm in diameter are allowed in the peripheral zone. For shafts ≤ 5 m2 in size, the edge strip width is 15 mm. The peripheral strip width is increased to 20 mm for glass sizes> 5 m2. If bubbles are present, the area of ​​blistering should not exceed 5% of the peripheral area.

6. Cracks

Cracks are not allowed.

7. Wrinkles and streaks

No wrinkles or streaks are allowed in the field of view.

8. Defects in the peripheral zone not provided for framing

Laminated glass is usually installed framed; if it is not framed, the edges may be:

- ground;

- polished;

- bevelled,

according to EN ISO 12543-5.

In such cases, chipping, bubbles, interlayer defects and recalls are acceptable if not noticeable during the test (see Chapter 9).

9. Test method

The laminated glass should be observed vertically and parallel to the frosted gray screen in bright diffused daylight or equivalent.

The observer should be at a distance of 2 m from the glass, observing it perpendicularly (the matte screen will be on the other side of the glass).

Observed defects should be highlighted.

The following applies to: metal components

1. The differences in curvature up to 5mm result from the expansion and contraction of the metal under the influence of temperatures and are not a defect of the product.

2. Paint loss that is not visible from a distance of 2 meters or more than 2 meters is not a defect of the product

3. Uneven weld seam (in other words - WELDING) is not a defect of the product

rusting of steel

the reason for this behavior of stainless steel may be iron contamination or particles of carbon steel. The reason may be the use of the same tools for stainless steel that we used, for example, for cutting or grinding other steels, or the work on this steel in the immediate vicinity of carbon (non-alloy) steels. It is unfavorable to transport and store together carbon steel and stainless steel. An additional element that may affect the corrosion resistance of stainless steel is contact with inappropriate, aggressive chemicals. Raids on stainless steel elements after the winter, stains and discoloration in production halls, tarnishing and initial pitting.

We calm down - this is a normal thing!

Stainless steel, among other materials, is famous for the fact that it does not require additional protection to protect its appearance and properties. Like any other construction material, it requires care and cleaning to keep its shine and aesthetic appearance for longer. Depending on the conditions in which a given stainless steel material is used, appropriate maintenance and cleaning is necessary. Stainless steel is resistant to corrosion due to the fact that the alloying elements create a thin transparent protective layer on its surface. It is very thin, but it is an ideal protection of the steel surface against corrosion. Ensure that all dirt is removed by proper maintenance. The frequency of cleaning and maintenance depends on the degree of use and conditions.

  • The first discoloration and dust that appears during the use of the material can be removed with an ordinary cloth, chamois leather or a nylon sponge, i.e. materials usually used every day in every household.

  • Steel scouring pads or wire brushes must not be used. Local discoloration caused by fingerprints, dust or rain can be removed very easily and quickly. If iron particles appear on the stainless steel elements, for example during assembly - they should be removed immediately. These particles will eventually begin to rust on their own and may break off the protective layer of the stainless steel. As a consequence, it will lead to rusting. Such deposits should be removed, either mechanically or with stainless steel cleaning agents.

  • If pitting appears on the element, acid etching or mechanical methods are required here.

  • A very important issue is to be particularly careful during assembly - it is best to install the stainless steel elements at the very end. It should be remembered that the etching process can irreversibly change the appearance of the object, which in most cases is not desired.

  • Local discoloration, grease imprints - plain soapy water is enough to remove them. For larger dirt, use an appropriate cleaning and maintenance agent.

  • Alcohol-based preparations can be used for cleaning, they do not pose a threat to the anti-corrosive properties of stainless steel.

  • After cleaning, it is always recommended to polish with a dry cloth.

  • Do not use for cleaning: detergents containing chlorides, and under no circumstances, silver cleaning agents.

The frequency of cleaning stainless steel elements - it all depends on the degree of use and the degree of contamination. This should be done at times such that the stainless steel components are rusted as little as possible.

It is recommended to clean every 12 months with little contamination and every 6 months with heavy contamination.

The following applies to: natural elements

1. RAPDACH is not responsible for sold natural elements, such as wood. Deformations caused by temperature differences and weather conditions are a natural phenomenon, not dependent on the Seller. We recommend preserving the wood as the seasons change.