Yes, you can use curling irons on lace front wigs, but the process and considerations vary depending on whether the wig is made from human hair or synthetic fibers.
For Human Hair Wigs
Human hair lace front wigs can be styled with heat tools, including curling irons, much like natural hair. Here are some tips for using a curling iron on a human hair deep wave wig:
Preparation:
Clean and Condition: Ensure the lace front wigs is clean and conditioned. Use a leave-in conditioner or detangling spray to make the hair easier to manage. 
Detangle: Use a wide-tooth comb or a wig brush designed for curly or wavy hair. Start from the ends and work your way up to the roots. 
Heat Styling:
Temperature Control: Set your curling iron to a moderate heat setting, usually between 300°F and 350°F. This temperature range is suitable for most human hair lace front wigs and helps prevent damage. 
Section the Hair: Divide the wig into small, manageable sections. This ensures even heat distribution and makes the styling process easier. 
Curling Technique: Wrap a small section of hair around the curling iron barrel and hold for about 8 to 10 seconds. Release the curl gently and clip it to cool. Cooling sets the style and helps the curls last longer. 
After Care:
Cool and Set: Let the wig cool completely before wearing it. This sets the style and allows the fibers to retain their new shape. 
Use Wig Hair Spray: Optionally, use a wig hair spray to set and hold the style. 
For Synthetic Wigs
Synthetic wigs can also be styled with heat tools, but they are more heat-sensitive and require special care:
Preparation:
Heat Protectant: Use a heat protectant spray specifically designed for synthetic hair. This helps protect the fibers from heat damage. 
Detangle: Use a wide-tooth comb or a wig brush to detangle the wig when it’s damp. Start from the ends and work your way up to the roots. 
Heat Styling:
Temperature Control: Set your curling iron to a low to moderate heat setting, usually between 270°F and 350°F. Synthetic lace front wigs are more sensitive to high heat, so it’s important to stay within this range to avoid melting or damaging the fibers. 
Section the Hair: Divide the wig into small, manageable sections. This ensures even heat distribution and makes the styling process easier. 
Curling Technique: Wrap a small section of hair around the curling iron barrel and hold for about 8 to 10 seconds. Release the curl gently and clip it to cool. Cooling sets the style and helps the curls last longer. 
After Care:
Cool and Set: Let the wig cool completely before wearing it. This sets the style and allows the fibers to retain their new shape. 
Avoid Heavy Products: Avoid using heavy products like oils or gels, as they can weigh down the wig and cause it to look greasy or limp. 
General Tips
Avoid Excessive Heat: Using excessively high temperatures can result in melting and damage to the hair fibers. 
Use Heat-Resistant Tools: Choose a curling iron with a ceramic or tourmaline barrel, as these materials distribute heat evenly and reduce frizz. 
Store Properly: Always store your lace front wigs on a wig stand or mannequin head to maintain its shape and avoid tangling. 
By following these guidelines, you can safely use a curling iron on your lace front wigs and achieve the desired look without causing damage.