IS 6707:1972 is the Indian Standard (BIS) for willow logs for artificial limbs. This standard specifies the requirements for willow logs, specifically from Salix alba and Salix fragilis species, intended for the manufacture of artificial limbs. It covers material quality, dimensions, moisture content, permissible defects, and marking protocols.
willow logs for artificial limbs
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Species Specificity | Exclusively for Willow logs (Salix species). | Covers a range of temperate hardwoods (e.g., ash, beech, oak, etc.). | BS EN 1316-1:2018 |
| Application Focus | Specifically for manufacturing artificial limbs. | General purpose for furniture, construction, veneer, etc.; no specific end-use defined. | BS EN 1316-1:2018 |
| Diameter/Girth Measurement | Specifies minimum girth at the thin end (e.g., 60 cm). | Reference measurement is the mid-diameter of the log, under bark. | EN 1927-2:2008 |
| Quality Classification | A single grade defined by a set of maximum permissible defects. | Multiple quality classes (e.g., A, B, C) with different allowable defect levels for each class. | BS EN 1316-1:2018 |
| Permissible Knots | Permits sound, live and intergrown knots up to a specified diameter (e.g., 20 mm). | Knot size is often limited relative to the log's diameter, with detailed rules for clusters and types. | BS EN 1316-1:2018 |
| Straightness (Sweep) | Logs shall be reasonably straight. | Sweep is measured quantitatively and has specific maximum limits for each quality class (e.g., 1 cm/m for Class A). | BS EN 1316-1:2018 |
| End Splits | Not to extend along the log for more than a specified distance. | Limits are defined based on log diameter and quality class; often distinguishes between simple and star splits. | BS EN 1316-1:2018 |