Does anyone know from their own experience what the approximate working time is for a soundboard panel before it starts to appreciably change its EMC. I realize it depends on the RH and temperature, so let me be more specific. I know that I can maintain a 6.2% EMC by simply keeping my shop at 30% RH and between 60 and 70 degrees F. While I have no trouble keeping my conditioning box at those numbers, getting my shop below 40% and stable is difficult--though I can keep it around 45% relatively easily. If I pull the panel out of its 30% RH box into a 45% RH room, approximately how much time do I have to work with it before it will move above 6.5%? At 45% RH and those temperatures listed above, the EMC would be more like 8.5%. I'm just trying to get a sense. Also, approximately how much time is needed back in the box to return it to 6.2% (assume 70o). David Love davidlovepianos@comcast.net
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