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The Biohazard Symbol with dimensions All parts of the biohazard sign can be drawn with a compass and straightedge . The basic outline of the symbol is a plain trefoil , which is three circles overlapping each other equally like in a triple Venn diagram with the overlapping parts erased.
The symbol for biohazard substances (without the black-yellow triangle.) ... 26 August 2021 (UTC): An actual vector drawing is far more useful than simply a Unicode ...
Reverted to version as of 03:40, 12 August 2021 (UTC): An actual vector drawing is far more useful than simply a Unicode character, which can be displayed by itself. 00:35, 27 December 2021: 512 × 512 (115 bytes) TSamuel: Remove extraneous attribute: 23:43, 26 December 2021: 512 × 512 (140 bytes) TSamuel: Redone by hand to minimize filesize
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
modified symbol to remove overlap on inner arc: 16:21, 10 August 2021: 512 × 446 (1 KB) Vizorsols: adjust triangle, ISO 3864-4 coloring (RAL 1003) 01:07, 4 August 2021: 512 × 447 (1 KB) Vizorsols: removed pixel of whitespace at bottom: 01:06, 28 July 2021: 512 × 448 (1 KB) Vizorsols: Perfect symbol. There is likely room for optimization: 00: ...
The international biohazard warning symbol as it appears in the Laboratory biosafety manual (Third edition) by the World Health Organization, Geneva 2004. Note that the sickles have blunt ends, not sharp ones. (Unlike most versions on the web) Blunt probably because sharp forms tend to print lousy images when stenciled.
Reverted to version as of 18:01, 26 August 2021 (UTC): An actual vector drawing is far more useful than simply a Unicode character, which can be displayed by itself. 00:27, 27 December 2021: 512 × 512 (127 bytes) TSamuel: Remove extraneous attribute: 00:18, 27 December 2021: 512 × 512 (152 bytes) TSamuel: Redone by hand to minimize filesize
The biohazard symbol was developed in 1966 by Charles Baldwin, an environmental-health engineer working for the Dow Chemical Company on their containment products. [1] It is used in the labeling of biological materials that carry a significant health risk, including viral samples and used hypodermic needles .