The use of black glass fiber can have varying impacts on human health, depending on the level and duration of exposure. Inhalation of fine glass fibers can lead to respiratory issues such as irritation, coughing, and in severe cases, fibrosis of the lungs. Skin contact may cause dermatitis or skin rashes. Long-term exposure to high levels of glass fiber dust can potentially increase the risk of respiratory diseases and lung cancer, although this is a subject of ongoing research and debate. Proper protective measures such as wearing masks and protective clothing can significantly reduce health risks associated with black glass fiber exposure.