Shore durometer R designation also mandates the employment of an operating stand. Some conditions and procedures that have to be met, according to DIN ISO 7619-1 standard are: The final value of the hardness depends on the depth of the indenter after it has been applied for 15 seconds on the material. If the indenter penetrates 2.54 mm (0.100 inch) or more into the material, the durometer is 0 for that scale. If it does not penetrate at all, then the durometer is 100 for that scale. It is for this reason that multiple scales exist. But if the hardness is <10
Michigan Shore-to-Shore Trail Michigan Shore-to-Shore Trail The Michigan Shore-to-Shore Trail (also known as the Michigan Riding and Hiking Trail) is a trail that runs between Empire on Lake Michigan and Oscoda on Lake Huron across the Lower Peninsula of Michigan. It is open to horseback riders and hikers but not bicycles. The trail's western end is located within the Sleeping Bear Dunes National Lakeshore. The trail, going from west to east, travels through the Boardman River valley and follows the Au Sable River for about . The trail was developed by trail riders in 1962 and travels through mixed hardwood and conifer forests.