panimula
ISO (International Organization para sa Standardisasyon) ay isang pandaigdigang pederasyon ng mga pambansang pamantayan ng katawan (Mga katawan ng miyembro ng ISO). Ang pagbuo ng mga internasyonal na pamantayan ay karaniwang isinasagawa sa pamamagitan ng ISO teknikal na komite. Ang bawat grupo ng miyembro na interesado sa isang paksa kung saan ang isang teknikal na komite ay itinatag ay may karapatang kumatawan sa Komite. Mga internasyonal na organisasyon, ang mga pamahalaan at mga non government organization na nakikipag ugnayan sa ISO ay kasangkot din sa gawaing ito. ISO ay gumagana nang malapit sa International Electrotechnical Commission (IEC) sa lahat ng bagay ng electrical standardization.

Ang draft international standard na pinagtibay ng Technical Committee ay ipapakalat sa mga miyembro ng mga katawan para sa pagboto. Publication as an international standard requires approval by a vote of at least 75% of the member bodies.

The international standard ISO 8780-6 was developed by the ISO/TC 35 Technical Committee on Paints and Varnishes.

ISO 8780 consists of the following sections, under the general heading Pigments and increments – Dispersion methods for assessing dispersion properties:

ISO 8780-6-1990 “Mga pamamaraan ng pagkalat para sa pagsusuri ng pagkakakalat katangian ng pigments at fillers – Bahagi 6: Pagkakalat gamit ang isang tatlong roll mill”

– Bahagi 1: Panimula

– Bahagi 2: Dispersion using oscillators

– Bahagi 3: Dispersion of grinding using high-speed impellers

– Bahagi 4: Dispersion using a bead mill

– Bahagi 5: Dispersion using an automatic grinder

– Bahagi 6: Dispersion using a three-roll grinder

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

1 Saklaw ng Aplikasyon
Ang bahaging ito ng ISO 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. Ang bahaging ito ng ISO 8780 is used in conjunction with the evaluation methods described in ISO 8781, using an agreed system of high viscosity adhesives that do not contain volatile substances. It should be read together 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 conventional reference pigment should be carried out at the same temperature.

ISO 8780-6-1990 “Mga pamamaraan ng pagkalat para sa pagsusuri ng pagkakakalat katangian ng pigments at fillers – Bahagi 6: Pagkakalat gamit ang isang tatlong roll mill”

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

Tala 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 a sufficient amount of abrasive for a wide range of evaluation procedures, ease of cleaning and the possibility of associated results with the results of the production machinery. Unlike dispersion equipment used for low-viscosity abrasive formulations, three-roll grinders such as those described in this part of ISO 8780 allow processing of a wide range of high-viscosity abrasive formulations. Because of this greater flexibility, it is not necessary to precisely specify the appropriate color paste formula.

ISO 8780-6-1990 “Mga pamamaraan ng pagkalat para sa pagsusuri ng pagkakakalat katangian ng pigments at fillers – Bahagi 6: Pagkakalat gamit ang isang tatlong roll mill”

2 Normatibong mga dokumento ng sanggunian
The following standards contain provisions which, by reference herein, 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 agreements based on this part of ISO 8780 are encouraged to investigate the possibility of applying new versions of the following standards. IEC and ISO members maintain a register of currently valid international standards.

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

ISO 842:1984, Raw materials for paints and varnishes – Pag sampling.

ISO 1524:1983, Mga pintura at barnis – Determination of fineness of grinding.

ISO 8780-1:1990, pigments and increments – Dispersion methods for the assessment of dispersion properties – Bahagi 1: Panimula.

ISO 8780-6-1990 “Mga pamamaraan ng pagkalat para sa pagsusuri ng pagkakakalat katangian ng pigments at fillers – Bahagi 6: Pagkakalat gamit ang isang tatlong roll mill”

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

ISO 8781-2:1990, pigments and increments – Methods for assessing dispersion properties – Bahagi 2: Assessment against changes in grinding fineness.

ISO 8781-3:1990 Pigments and increments – Methods for assessing dispersion properties – Bahagi 3: Assessment from changes in gloss.

Ang standard information section lamang ang pampubliko. Upang makita ang buong nilalaman, kailangan mong bilhin ang pamantayan sa pamamagitan ng mga opisyal na channel.