ASTM D1003 vs ISO 13468 vs ISO 14782: A Guide to Haze and Transmittance Standards

Haze and Transmittance Standards Guide

Fulcrum Insight | Haze Testing Standards

ASTM D1003 vs ISO 13468 vs ISO 14782: Understand Haze and Transmittance Testing Standards

Haze and light transmittance are common optical properties used to inspect transparent materials. They are relevant to plastic sheets, films, transparent packaging, glass, optical films, display materials and translucent samples in quality control, R&D and customer acceptance. When a specification cites ASTM D1003, ISO 13468 or ISO 14782, first confirm whether it requires haze, total luminous transmittance or specific measurement conditions—not simply which haze meter to buy. This guide summarizes the main differences. For equipment options, see haze and transmittance measurement instruments: https://www.fulcrum-technology.com/hazemeter-penetrationmeter.

ASTM D1003 | ISO 13468 | ISO 14782 | Haze | Light transmittance | Transparent-material testing

Key takeaway: ISO and ASTM are not a question of which is more accurate; they address different test purposes. ASTM D1003 is commonly used to evaluate haze and transmittance of transparent plastics. ISO 13468 focuses mainly on total luminous transmittance of transparent plastics. ISO 14782 focuses on haze measurement of transparent materials. Select a standard based on the customer specification, acceptance documents, sample type, measurement items and reporting requirements—not only export destination or a perceived level of strictness. Confirm applicability against the relevant edition, instrument manufacturer information, sample conditions and customer requirements.

Why haze and transmittance standards matter

Haze affects whether a material looks cloudy, milky or whitish; transmittance relates to the proportion of light that passes through it. Both can affect appearance and customer acceptance for clear packaging, plastic film, optical film, display materials and transparent sheets. If the test standard is not confirmed first, results may not be comparable—for example, a supplier reports ASTM conditions while the customer requires ISO, or an internal spot-check is used where a formal report under a specified standard is required. Such differences can complicate quality decisions and acceptance discussions.

What does each standard measure?

ASTM D1003 — Haze and transmittance of transparent plastics. It is commonly used to assess light transmission and cloudiness caused by scattering in transparent plastic materials. If specified by a customer, confirm that the instrument, test conditions and report fields meet the requirement.

ISO 13468 — Total luminous transmittance. It mainly concerns measuring total luminous transmittance in the visible range for transparent plastics and is often used to evaluate molded transparent materials, films and sheets. If total light transmission is the priority, confirm whether ISO 13468 is the specified method.

ISO 14782 — Haze measurement of transparent materials. It focuses on haze caused by light scattering. Applicability depends on sample transparency, thickness, surface condition and the standard edition.

Comparison at a glance
ASTM D1003: Purpose—evaluate haze and transmittance of transparent plastics; common items—Haze and Luminous Transmittance; answers whether the material is hazy and whether transmission meets requirements; typical samples—clear plastics, sheets, films and packaging; selection note—confirm whether both haze and transmittance are needed.
ISO 13468: Purpose—measure total luminous transmittance of transparent plastics; common item—Total Luminous Transmittance; answers whether total light transmission meets requirements; typical samples—molded transparent materials, films and sheets; selection note—confirm total transmittance is the focus.
ISO 14782: Purpose—measure haze in transparent materials; common items—Haze and cloudiness due to scattering; answers whether scattering-related haze meets requirements; typical samples—transparent or near-transparent materials, films and sheets; selection note—confirm haze is the required value.

How haze, total transmittance and scattered light relate

Appearance depends not only on how much light passes through a material but also on whether light changes direction as it passes. Total transmittance describes the amount of transmitted light; haze relates to the proportion scattered. Internal microstructures, rough surfaces, uneven filler dispersion, scattering coatings or processing variations can make a sample appear cloudy, whitish or unclear even when its transmittance is not low. A simplified relationship is: total transmitted light Tt = regular transmitted light Tp + diffuse transmitted light Td; Haze = Td / Tt × 100%. For a basic explanation, see the difference between haze, transmittance and transmission: https://www.fulcrum-technology.com/haze-transmittance-difference.

Industries that use ISO and ASTM haze standards

Plastic sheets and films: PET, PC, PMMA, protective films, packaging films and clear sheets may require haze, total transmittance and batch consistency checks.
Transparent packaging: Food and cosmetic packaging, clear boxes and label films must balance product visibility, transparency and cloudiness.
Optical films and display materials: Protective films, diffuser films, display materials and high-transparency films may require transmittance, haze, clarity and appearance consistency checks.
R&D and customer acceptance: Material substitutions, supplier changes, formulation adjustments and customer approvals often require comparable data under specified standards.

Initial instrument selection by testing need

YH40 handheld haze meter: Consider for on-site inspections, incoming-material spot checks and quick process checks. If ASTM or ISO conditions are specified, confirm suitability against the actual acceptance requirements. https://www.fulcrum-technology.com/handheld-haze-meter-yh40
YH1100 / YH1200 vertical haze meters: Compare these when fixed-condition haze and transmittance measurements and standardized QC workflows are needed. https://www.fulcrum-technology.com/vertical-haze-meter-transmittance-meter
YH1210 horizontal haze meter: Consider for flat films, sheets, glass and transparent packaging requiring haze and transmittance under conditions such as ASTM D1003 or ISO 13468, when transmitted color and color-difference data are not required. https://www.fulcrum-technology.com/haze-meter-yh1210
YH1600 / YH1610 color haze meters: Consider when CIE Lab, color difference or transmitted-color data are also needed. https://www.fulcrum-technology.com/haze-meter-yh1600 and https://www.fulcrum-technology.com/color-haze-meter-yh1610
YH1810 color haze meter: Consider when clarity measurement is needed in addition to haze, transmittance and transmitted color. https://www.fulcrum-technology.com/color-haze-meter-yh1810

What to prepare before an inquiry or selection

Standards and reporting: Confirm whether the customer specifies ASTM D1003, ISO 13468, ISO 14782 or an internal method; provide the edition and required report fields if available.
Sample material and thickness: Identify plastic, glass, film, optical film, clear packaging or liquid, plus sample dimensions, thickness and surface condition.
Measurement items: Confirm whether you need haze, total luminous transmittance, transmittance, color difference, transmitted color, clarity or only some of these.
Use case: R&D, incoming inspection, in-process sampling, outgoing inspection or customer acceptance can affect whether a handheld, vertical or horizontal instrument is appropriate.

FAQ: ISO and ASTM haze testing

Q1. Can ASTM D1003, ISO 13468 and ISO 14782 replace one another?
They should not be assumed interchangeable. Their test purposes and focus differ; confirm the customer specification, edition, sample conditions and reporting needs.

Q2. The customer says only “haze” or “transmittance” without a standard. What should I do?
Confirm whether the customer expects ASTM, ISO or an internal method. Without an agreed method, data from different instruments or conditions may not be directly comparable.

Q3. Is a handheld haze meter suitable for standard testing?
Handheld meters are useful for quick inspections, incoming spot checks and on-site confirmation. Suitability for formal acceptance under a specified standard must be confirmed against customer requirements, the standard and manufacturer documentation.

Q4. What is the difference between haze and total luminous transmittance?
Total luminous transmittance describes how much light passes through; haze relates to the proportion of scattered light. A material can transmit substantial light but still look cloudy because of scattering.

Q5. Who decides whether to use ASTM or ISO?
The customer specification, industry standard, acceptance documents and internal QC process usually determine this. If uncertain, gather the sample details and customer requirements before confirming the measurement method and equipment.

Need to confirm whether a haze meter meets ASTM or ISO testing needs?
Provide the required standard, sample material and thickness, measurement items and reporting requirements. Fulcrum Technology can help evaluate handheld, vertical or horizontal haze and transmittance instruments. Contact Fulcrum Technology for selection advice: https://www.fulcrum-technology.com/contact-us.