--- title: "5. Quality Inspections | HIMACS Fabrication Guidelines" slug: "5-quality-inspection" description: "Ensure quality with HIMACS shipment and sheet inspections, focusing on colour consistency, dimensions, and defects for optimal results in fabrication." tags: ["Colour Matching", "HIMACS Products", "Shipment Inspection"] updated: 2026-01-27T13:23:39Z published: 2026-01-27T13:23:39Z --- > ## Documentation Index > Fetch the complete documentation index at: https://himacs-fabrication.lxhausys.com/llms.txt > Use this file to discover all available pages before exploring further. # 5. Quality Inspections ![5.jpg](https://cdn.document360.io/182b9fdb-2e1d-49a1-8920-10138c8bc239/Images/Documentation/5.jpg) ## **1. Common Shipment Inspection** After off-loading, it is recommended to **inspect all goods** as follows: - Confirm **quantities and colours** of all HIMACS products match the order. - Verify **sheet number sequences** for multi-sheet projects. Please refer to the document **“**[**3. Sheet Number**](/main/docs/3-sheet-number)**”**. - Check for potential **damage to factory-applied peel coats or packaging boxes**, which may indicate underlying damage to HIMACS products. For sheets, inspect for: - **Irregular edges or corners** - **Bending, twisting, or**Warping - **Noticeable thickness variation** *(Inspect more carefully before fabrication.)* - If a **defective product** is found: - **Identify the material** and record the issue - Take **photographs** to illustrate the defect - Make a **detailed statement** including all relevant product information (**reference, traceability, format, etc.**) - **Register the information** on the **HIMACS Distributors Service Portal** to submit the claim ## **2. HIMACS Sheet Inspection** ### **2.1 Colour & Pattern Evaluation** Checking**colour consistency between sheets**and **within individual sheets** is an essential step when inspecting HIMACS products. Due to the composition and manufacturing process of HIMACS sheets: - Slight colour variations may occur **between different production cycles.** - Each colour group has **its own unique aesthetic,** with inherent variations caused by chips, veins, and glitter elements within the same sheet. > [!NOTE] > Important: > > **LX Hausys does not guarantee colour matching** between sheets from different lot numbers, nor a perfect match within colour groups that have their own **distinctive aesthetic variations**. > > Ensuring the **best and acceptable colour match** is the responsibility of the **fabricator and installer**. > > To achieve **optimal results**, LX Hausys strongly recommends following **strict guidelines** and referring to the **Sheet Information** to enhance **colour consistency** between and within HIMACS sheets. ### **2.2 Colour Match** - Check the sheet number printed on side edge of each sheet and use same LOT number sheets. Easy way is using the sheets on same pallet. - Proceed to gluing test on 2 small pieces together and visually check the color matching result. - The colour difference between solid color sheets in same lot number should be less than △E 0.8 ### **2.3 Colour irregularities within a sheet** **Solid Colour Sheets:** - If you notice **blotches within a sheet** during inspection, **contact your supplier** for further inspection and **replacement if necessary**. **Veined Colour Groups (****Concrete**, **Aurora**, **Marmo****):** - These colours have **intentionally irregular, randomly distributed veins**. - The **natural aesthetic** created by these veins is **unique**, and **patterns on the face and/or edges will not be identical** within a sheet or between sheets. - Sheets from veined colour groups should be **fabricated carefully following exclusive guidelines**. **Chip Colour Groups (****Granite**, **Lucia**, **Volcanics**, **Aster****):** - These sheets are designed with **irregularly distributed small or large chips**, which are a **key part of the design**. - **Irregular chip distribution is not a defect.** - If any **abnormal chip distribution** is observed within a sheet or between sheets of the same lot number, **contact your supplier** for inspection and **possible replacement**. **Glitter / Sparkling Effect:** - Some sheets contain **glitter chips** for a **sparkling effect**. - Due to the **shape of the glitter chips**, the sparkling effect is **visible only on the face side**, not on edges or sections. - **Missing sparkling effect on edges or sections is not considered a defect.** > [!NOTE] > Notes for Inspection and Colour Matching: > > 1. **Record the sheet number** printed on the **edge and back side**; this helps with **colour matching during fabrication**. > 2. **Trial colour matching** can be quickly checked by **gluing two small pieces** with **cyanoacrylate adhesive (super glue)**. > 3. Avoid inspecting under **bright lights** such as **direct sunlight**. > 4. Do not join sheets of **different dimensions** or **different sheet numbers**; this will compromise **colour match**. > 5. Only the **face, edges, and section (thickness direction)** are valid surfaces for **colour and pattern inspection**; the **back side** is not suitable for **quality checks**. ### **2.4 Dimensions** For standard dimension details, refer to the document [“2. Sheet Information.”](/main/docs/2-sheet-information) HIMACS sheets may include an **additional size allowance of up to 10 mm** in both length and width. This buffer zone helps protect the primary usable area from direct damage, such as edge cracks or scratches, that may occur during transportation and handling. The finish on the sheet’s edge section is **not suitable for joining**; therefore, the original edge should be trimmed before making any joins. Refer to the document “[8. Cutting and Cutout](/main/docs/8-cutting-cutouts)” for detailed instructions. ### **2.5 Flatness** Any warping should be less than **2 mm per meter for 12 mm thick sheets, and 2.5 mm per meter for 20 mm thick sheets** upon delivery. ### **2.6 Face side effects** Minor defects (e.g., small stains, scratches, ripples, etc.) can be removed by sanding. However, if more serious defects are found, please contact your supplier for inspection and, if necessary, replacement. ### **2.7 Back side effects** HIMACS sheets are **one-sided materials.**Therefore, minor defects on the back side (e.g., small stains, scratches, ripples, etc.) do not affect the quality of the final finished product and can be removed by sanding. However, if more serious defects are found, please contact your supplier for inspection and, if necessary, replacement. ## **3. HIMACS adhesive inspection** - Check the **label** for the **date of manufacture** and **colour**. - Inspect for any **visible damage** to the **cartridge, tube, or accessories**. - Check whether any **contents have leaked**. ## **4. HIMACS sheet specifications** | **Inspection Items** | **Colours** | **Specification** | | --- | --- | --- | | Colour, Pattern Irregularities | **Solids** | Less than ΔE < 0.8 | | Other | Irregular distribution | | Dimensions | Thickness | 12 mm ± 0.4 mm20 mm ± 0.8 mm | | Width | Less than +10 mm to nominal value | | Length | Less than +10 mm to nominal value | | Flatness | Convex Wrapping | 12 mm: Less than 2 mm/m20 mm: Less than 2.5 mm/m | | Concave Wrapping | 12 mm: Less than 2 mm/m20 mm: Less than 2.5 mm/m | | Face Side | Dark Spots | Less than 2 impurities (diameter < 0.7 mm²) per meter | | Dark Spots | Light Spot | | Light Spot / pine holes | Pine Holes | None | | Back Side | Pine Holes | Less than 50 impurities (diameter < 2 mm²) per meter | > [!NOTE] > This guideline has been created to provide technical information for successful fabrication and installation of [HIMACS](https://www.lxhausys.com/eu-en/himacs), and it is intended to be used in a safe environment considering their own discretion and risk by who has technical skill for fabrication and installation of HIMACS. > > This guideline is continually revised to provide reliable and up-to-date information, replacing all previous versions of the guideline and technical information, however the usage and conditions of use are beyond[](https://www.lxhausys.com/eu-)[LX Hausys](https://www.lxhausys.com/eu-en) control, LX Hausys cannot guarantee the suitability of material, fabrication and installation for all usage and conditions of use. Users should not regard or rely on this guideline as a complete, sole, up-to-date or absolute information. HIMACS users, fabricator and installer should review whether the design for HIMACS, fabrication method, installation method and required performance are suitable for the intended use and conditions of use. LX Hausys shall not be liable for any direct or indirect, commercial damages or losses caused by the fabrication and installation results of HIMACS using any or all these guidelines. In addition, the results of joining with other materials, and the fabrication and installation guidelines for other materials shall not be covered by LX Hausys. > > This guideline does not encourage to violate any laws, patents and licenses, and cannot be used as a basis for legal liability. All works on / from HIMACS must be performed in accordance with related laws and regulations. > > LX Hausys reserves the right to change the technical information and disclaimers in this guideline for technical development and further information, and the use of HIMACS or this guideline is considered to accommodate the information and changes provided in this guideline. Therefore, please check the changed details of this guideline from time to time. > > LX Hausys reserves all information in this material, and no reproduction or alteration is permitted in any way for all or any part of the information without the official written permission of LX Hausys. Deviation of the sheet from a perfectly flat plane; acceptable limits: 12 mm sheets ≤ 2 mm/m, 20 mm sheets ≤ 2.5 mm/m. Unique identifier printed on the edge of each sheet, used to track production batch and ensure colour/pattern consistency. Delta E; Measurement of colour difference between sheets; for solid colours Small, natural imperfections on the back side of sheets; limited to less than 50 impurities (≤2 mm² per meter). ## Attachments - [5- FABRICATION GUIDELINES - QUALITY INSPECTIONS.pdf](https://cdn.document360.io/182b9fdb-2e1d-49a1-8920-10138c8bc239/Images/Documentation/5- FABRICATION GUIDELINES - QUALITY INSPECTIONS.pdf)