Bamboo Turning Black with Outdoor Use

Hi, we are doing a project using bamboo as facade under intense sun and rain in summer ( subtropical climate). We did the boric borax solution treatment beforehand already, however under the rain season, some selective bamboos are blackened intensely, why is that and what other solutions/ treatments can prevent such situation from happening?

Stéphane Schröder

Guadua Bamboo SAS

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Bamboo Surface Treatment

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What Determines the Length of Bamboo Internodes?