предговор
ИСО (Међународна организација за стандардизацију) је глобална федерација националних тела за стандардизацију (Тела чланица ИСО). Развој међународних стандарда се обично спроводи преко ИСО техничких комитета. Each member group interested in a subject on which a technical committee has been established has the right to be represented on the Committee. International, governmental and non-governmental organizations in liaison with ISO are also involved in this work. ИСО блиско сарађује са Међународном електротехничком комисијом (ИЕЦ) о свим питањима електричне стандардизације.

The draft international standards adopted by the Technical Committee will be circulated to member bodies for voting. Публикација као међународни стандард захтева одобрење са најмање гласова 75% of the member body.

Међународни стандард ИСО 8780-6 was developed by the ISO/TC 35 Technical Committee on Paints and Varnishes.

ИСО 8780 consists of the following sections under the general heading Pigments and Increments – Dispersion Methods for assessing dispersion properties:

— Парт 1: Увод

— Парт 2: Dispersion using oscillating motors

— Парт 3: Dispersion using high speed impeller mill

— Парт 4: Dispersion using a bead mill

— Парт 5: Using an automatic grinder for dispersion

— Парт 6: Dispersion using a three-roll grinder

Appendix A forms an integral part of this part of ISO 8780.

ИСО 8780-6-1990 “Dispersion methods for evaluating dispersion properties of pigments and fillers — Парт 6: Dispersion using a three-roll mill”

1 Обим примене
Овај део ИСО-а 8780 specifies a method for dispersing pigments and increments using a three-roll grinder. The results allow conclusions to be drawn about the behavior of the test product when dispersed using the corresponding production machine. Овај део ИСО-а 8780 is used in conjunction with the evaluation methods described in ISO 8781, using an agreed upon high viscosity adhesive system that does not contain volatile substances. It should be read in conjunction with ISO 8780-1.

This method is limited to high viscosity abrasives. In order to improve the precision of the method, it is suggested that the dispersion procedure of the test pigment and the agreed reference pigment should be carried out at the same temperature.

The results obtained are not suitable for comparison with the dispersion results obtained using other dispersion methods.

Белешка 1 The advantages of the three-high mill described in this section of ISO 8780 are ease of handling the equipment, the ability to prepare sufficient quantities of abrasive for extensive evaluation procedures, ease of cleaning and associated probable results with the results of the production machinery. Unlike dispersion devices used for low-viscosity abrasive formulations, three-roll grinders such as those described in this part of ISO 8780 allow processing of a variety of high-viscosity abrasive formulations. Because of this greater flexibility, it is not necessary to precisely specify the appropriate color paste formula.

2 Normative reference files
The following standards contain provisions which, by reference, constitute the provisions of this part of ISO 8780. At the time of publication, the version shown is valid. All standards are subject to revision and parties to an agreement based on this part of ISO 8780 are encouraged to investigate the possibility of applying the latest versions of the following standards. IEC and ISO members maintain a register of international standards currently in force.

ИСО 787-24:1985, General methods of test for pigments and increments – Парт 24: Determination of the relative tinting force of coloured pigments and the relative scattering force of white pigments – photometric method.

ИСО 842:1984, Raw Materials for paints and varnishes – Sampling.

ИСО 1524:1983 Боје и лакови – Determination of grinding fineness.

ИСО 8780-1:1990, pigments and increments — Dispersion methods for the evaluation of dispersion properties — Парт 1: Увод.

ИСО 8781-1:1990, pigments and increments – Methods for assessing dispersion properties – Парт 1: Assessment against changes in the tint strength of coloured pigments.

ИСО 8781-2:1990, pigments and increments – Method for assessing dispersion properties – Парт 2: Assessment against changes in grinding fineness.

ИСО 8781-3:1990, pigments and increments – Methods for assessing dispersion properties – Парт 3: Assessment from changes in gloss.

Јаван је само одељак са стандардним информацијама. Да бисте видели цео садржај, морате купити стандард преко званичних канала.