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vheflin

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Posts posted by vheflin

  1. "Besides light, there are additional environmental concerns, such as temperature and humidity, that can adversely affect a collection. For every 18 degree F (10 C) increase in temperature, it is estimated that chemical reactions in paper double. Relative humidity is a measure of the capacity of air to hold water. This amount varies as temperatures increase or decrease. Paper and other porous materials either absorb or lose moisture as temperature and humidity levels vary. This action causes shrinking, stretching, and the eventual breakdown of structural fibers, while contributing to formation of acids. The effect is similar to the cracking, splitting, and weaknesses that result when an outdoor wooden deck is left unprotected, though on a microscopic level."

  2. On 7/20/2021 at 11:37 PM, grendelbo said:

    Great selection this contest. 

    And largely out of my hobby-focus. 

    Later tonight I'm making notes. (And I have a notebook on grading with other resources.)

    Rat chew on an otherwise great book - moderate: -2.0 deduction +/-.

    As I said in the Round 4 post, I had that Romance around 7.5/8.0 absent the chews. How low could it go? Not to VG. It's not a VG copy. 4 grade drop seemed fair as did the FN range.

    Fun + Education (x Refinement of skills) = This Contest.

    I had that one at 8.5/9.0 and deducted a full 3.0 for the chew.