What is the recommended temperature range for perm solutions?

The recommended temperature range for perm solutions is 60-85 degrees Fahrenheit. This specific range is optimal for achieving the best results when using perm solutions, as it allows the chemicals to effectively break and reform the hair's disulfide bonds, facilitating the curling process. Within this temperature range, the chemical reactions can occur properly, resulting in a successful perm with minimal damage to the hair. Maintaining a consistent and suitable temperature is crucial for ensuring uniform results, as temperatures that are too low may not activate the chemicals adequately, while excessively high temperatures could risk damaging the hair structure. The other ranges provided are not ideal, as they fall outside the effectiveness zone for perm solutions.