Choice of alkalis, called “bleaches”Choice of acids, called “toners”Quick and easy measurementsHighlight stainingToning tipsOne-bath tonersTrisodium phosphate tonerSodium carbonate tonerBorax or ammonia tonerTea tonerOne-bath tannic-sodium carbonate tonerLead acetate tonerTwo-bath tonersGeneric two-bath alkali-acid tonerPyrogallic-hydrogen peroxide toner