What is the purpose of tack cloth after blowing off dust?

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After blowing off dust, you want a surface that is truly clean and ready for primer or paint. A tack cloth does the job by sticking to and lifting the finest dust particles that the air can’t remove, or that resettle after the blow-off. This sticky cloth helps prevent fine particles from causing texture, defects, or poor adhesion in the finish, giving you a smooth, clean surface. Use it gently with a single-direction wipe and replace the cloth when it becomes loaded with dust or oils to avoid transferring contaminants back to the surface.