Overview
ISO 28499-1:2009 is an international standard developed by ISO (International Organization for Standardization) that provides a detailed description of defects found on buffalo hides and buffalo calf skins used in tanning processes. This standard specifically applies to water-buffalo hides and water-buffalo calf skins, excluding wild buffalo and American bison. It aims to standardize the identification and classification of defects to aid quality control and improve the grading process of raw hides and skins in the leather industry.
Key Topics
The standard categorizes defects into three main groups:
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Ante-mortem Defects: These are defects that occur while the animal is alive, such as:
- Blind warble holes caused by parasitic larvae.
- Brand marks from man-made identification.
- Bruises and dung damage leading to grain coarsening.
- Disease-related defects like gangrene, hump sores, ringworm, and surra.
- Physical damage including goad marks, horn marks, horn rakes, and tick marks.
- Urine damage and yoke marks affecting skin quality and color.
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Post-mortem Defects: These arise during or after slaughtering, including:
- Badly bled skins causing visible blood clots.
- Corduroying from poor flaying technique.
- Cut throat and flay cuts damaging hide structure.
- Excess flesh on fallen animal hides.
- Gouges, grain breaks, holes, and scores caused by tools or machines.
- Poor asymmetry or pattern affecting hide value.
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Preservation Defects: Defects that develop during hide preservation, such as:
- Hair slip revealing early putrefaction.
- Pitting due to salt or foreign particle damage.
- Discoloration like purple discolouration, red heat, and salt spots.
- Salt stains and stippen from curing salts.
- Sun blisters caused by rapid drying.
- Veininess caused by improper bleeding or curing.
Applications
ISO 28499-1:2009 serves as a practical tool for professionals involved in the leather and tanning industries by:
- Quality Control: Providing standardized criteria to identify and document defects, enabling consistent quality assessment of buffalo hides and calf skins.
- Grading and Pricing: Assisting tanners and leather manufacturers in grading raw hides based on defect presence, which directly influences their market value.
- Process Improvement: Highlighting common causes of defects to inform better handling, slaughtering, and preservation practices to reduce hide damage.
- Supply Chain Transparency: Facilitating clear communication among suppliers, processors, and buyers by using a common language regarding hide defects.
Related Standards
ISO 28499-1 is part of a series focused on buffalo hides and calf skins, complemented by:
- ISO 28499-2: Grading of buffalo hides and calf skins based on mass and size.
- ISO 28499-3: Grading based on the types and extent of defects.
These related parts build upon the defect descriptions to offer comprehensive guidance on grading and valuation within the buffalo hide industry.
By adhering to ISO 28499-1:2009, stakeholders in the leather supply chain can enhance the consistency and reliability of buffalo hide evaluation, ensuring improved product quality and optimal resource utilization. This standard plays a critical role in supporting sustainable and efficient leather production from water-buffalo raw materials.