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LBTD 425 C Light Source and Glauber Colorimeter

Name: LBTD 425 C Light Source and Glauber Colorimeter
Brand: Laibote (Tianjin) Testing Machinery
Availability: InStock

The Type 425 C‑source colorimeter consists of an illumination unit equipped with the CIE standard illuminant C and 18 test tubes, each labeled with a specific color number.

Category:

Paint, Coating Film, and Coating Testing Instruments

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E-mail:

lbt@lbt.ltd

WhatsApp:

+86-15102211717

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LBTD 425 C Light Source and Glauber Colorimeter

Description

Product Introduction

The Type 425 C‑light‑source colorimeter consists of an illumination unit equipped with a CIE‑standard light source C and 18 test tubes, each labeled with a specific color number. During testing, the sample to be evaluated is placed in one of the instrument’s glass tubes, and its color is visually compared, under the standard illumination, with the colored reference tubes of varying numbers. The color most closely matching the sample is identified, and the result is expressed as a Hunter‑L*a*b* color number.

This instrument complies with the national standard GB/T 9281-2008, “Colorimetric Assessment of the Color of Transparent Liquids Used in Paints and Varnishes—Gardner Color Scale,” and the international standard ISO 4630‑1:2004. It is used to evaluate the color of yellow or brown transparent liquids and is suitable for drying oils, varnishes, and fatty acid solutions, as well as polymeric fatty acids, resins, tall oil, tall oil fatty acids, rosin, and related products.

Technical Specifications:

1. Work Standard: The color standards for 18 liquid samples are prepared in strict accordance with the requirements of the international standard ISO 4630.

2. Glass test tube: A colorless, transparent cylindrical vessel with an inner diameter of 10.65 ± 0.025 mm, an outer diameter of approximately 12.5 mm, and a wall length of about 114 mm.

3. The spectral power distribution of the light source is similar to that of the CIE standard illuminant C, and the light passes laterally through the working standard and the sample.

4. The surrounding environment is neutral in color, and both working standards and one test sample are within the field of view.

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FAQs

Do you supply full-set testing instruments for asphalt and geotechnical engineering projects?

We offer complete lab solutions including asphalt viscosity tester, asphalt rutting tester, geotextile permeability tester, low-temperature flexibility tester and concrete/cement test equipment, covering raw material detection for road, water conservancy and construction engineering projects

Can you customize fixtures or test machines based on our special test requirements? How about after-sales service and warranty?

We provide non-standard customization of test equipment and customized fixture clamps according to customers’ specimen size and test standards. All our testing machines enjoy 12-month factory warranty; overseas customers get remote online debugging guidance, spare parts supply and technical operation training. Our products have been exported to over 70 countries globally

Which materials can be measured by your Vicat softening point tester?

It measures heat deflection temperature and Vicat softening temperature of plastics, hard rubber, nylon, insulating materials and fiber-reinforced thermosetting composites. Intelligent temperature control guarantees precise heating rate, ideal for plastic raw material incoming inspection and formula development in plastic factories.

Does your pipe pressure burst testing machine control test temperature automatically? What’s its main application?

Yes, the constant-temperature circulating system keeps stable test environment during long-time hydrostatic resistance and instant burst pressure measurement of thermoplastic pipes. It complies with GB6111 standard and serves raw material inspection, new product R&D for plastic pipe manufacturers, third-party testing labs and university laboratories.

What kinds of pipes fit your ring stiffness tester? Can it do long-term creep testing?

This equipment is designed for HDPE, PVC corrugated pipes, plastic drainage pipes and various plastic tubular products. Apart from ring stiffness, ring flexibility and flattening tests, it supports continuous long-term creep tests up to 1000 hours (42 days) as required by industry specifications, widely used for pipe factories and construction quality inspection institutes.

What test items can your WDW series computer-controlled electronic universal testing machine complete? Which international standards can it meet?

Our WDW universal tester is applicable for tension, compression, bending, shearing and peeling tests of metal, plastic, rubber and composite materials. It supports test procedures in accordance with GB, ISO, ASTM, DIN, JIS multiple domestic and global standards. Equipped with high-precision servo drive and dedicated test software, it automatically collects, calculates and exports test data including tensile strength, elongation at break and elastic modulus.

Customer Reviews

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From Tanaka Hiroshi, R&D Supervisor, Indonesia rubber materials enterprise

2026.06.05

★★★★★

“Laibote’s Vicat softening point tester and electronic tensile machine have been applied to our raw material incoming inspection and new formula development for over one year. High testing accuracy effectively controls our product defect rate. What impresses us most is their responsive after-sale service; technical staff reply our troubleshooting requests within 24 hours even for time zone differences. Compared with expensive European brands, Laibote’s equipment balances quality and price excellently, we plan to expand procurement of auxiliary testing instruments next quarter.”

Middle East Construction Lab｜Purchase: Universal Electronic Testing Machine & Geotextile Test Equipment

From Mohamed Kareem, Lab Manager, UAE third-party construction inspection institute

2026.06.05

★★★★★

“We compared multiple testing equipment brands from Europe and China before cooperating with Laibote. Their WDW universal tester and full-set geotextile testing instruments meet local construction testing standards perfectly. Custom fixtures tailored per our specimen specifications save much testing time. Pre-sale technical communication was patient and professional; engineers provided online operation training after goods arrived. Stable machine performance greatly improves our laboratory’s detection efficiency, we are satisfied with cost performance and overall service.”

European Plastic Pipe Manufacturer｜Purchase: Ring Stiffness & Hydrostatic Burst Tester

From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

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