What is important about tape performance is making sure that the tape head bias during record matches the tape you are using. To set this up usually requires a bit of test equipment.
Modern tape absorbs moisture over time which causes them to shed their oxides. You can use a low temperature oven on low for 45 minutes to an hour (a car on a hot day works well also) to force the moisture out of the tape and it will then work for months or years before you have to do it again. I store tape in a plastic bag with a bag of silica-gel to reduce moisture absorption by the tape.
Modern tape absorbs moisture over time which causes them to shed their oxides. You can use a low temperature oven on low for 45 minutes to an hour (a car on a hot day works well also) to force the moisture out of the tape and it will then work for months or years before you have to do it again. I store tape in a plastic bag with a bag of silica-gel to reduce moisture absorption by the tape.