The boundary instructions spray-painted on the DNR trees are rarely open to misinterpretation. But this “1/2” designation on a forked bough is a rare treat of inspired micromanagement.
But the real reward was doing a little research into this and finding the official USFS specifications on tree marking paint, of which the following is but a small sampling:
3.4.3. Spraying Properties.
126.96.36.199. Type A and B. When tested in accordance with 188.8.131.52, TMP shall be capable of producing
a 3- to 5-inch-diameter spot at a minimum distance of 6 feet at temperatures of -20 °F to 104 °F and
relative humidities to 100 percent.
184.108.40.206. Type C. When tested in accordance with 220.127.116.11, TMP shall be capable of producing a 3- to
5-inch-diameter spot at a minimum distance of 6 feet at temperatures of 20 °F to 100 °F and relative
humidities to 100 percent.
18.104.22.168. Type D. When tested in accordance with 22.214.171.124, Type D paint shall deliver a minimum of 95
percent of net contents without sputtering or interruption. When tested in accordance with 126.96.36.199.1
and 188.8.131.52.2 the nozzle(s) shall project a thin solid stream of marking paint and be capable of
writing numbers or letters and producing a solid band of marking paint.
3.4.4. Adhesion. When tested in accordance with 4.7.5, TMP shall adhere to cold and to wet wood
surfaces and shall show no evidence of blistering or film failure.
3.4.5. Accelerated Weathering. When tested in accordance with 4.7.6, TMP shall show no checking
or peeling and the color change shall not be greater than a delta E value of 12. The field and
laboratory tracers shall be detectable after weathering.
3.4.6. Odor. When tested in accordance with 4.7.7, the odor of the paint shall be acceptable at time
of paint application at the field site.
3.4.7. Contrast Ratio. When tested in accordance with 4.7.8, the minimum contrast ratio of 12 mil of
wet film shall be…..