This study aimed to identify how the combination of thinning techniques (inner, root, line) and thinning shear tooth counts (25T, 30T, 35T) influences weight-reduction sensation—specifically texture, volume, flow, and silhouette—in a medium-length...
This study aimed to identify how the combination of thinning techniques (inner, root, line) and thinning shear tooth counts (25T, 30T, 35T) influences weight-reduction sensation—specifically texture, volume, flow, and silhouette—in a medium-length graduation style. The purpose was to provide foundational data applicable to both professional hairdressing practice and educational settings.
For the research method, a uniform base cut was established, after which three thinning techniques and three thinning levels were combined to produce a total of nine works. Each combination was analyzed both quantitatively and qualitatively in terms of changes in texture, volume, flow, and silhouette. Human-hair wigs with consistent density and texture were used to ensure objective comparison of differences arising solely from thinning techniques and thinning levels under controlled conditions. The analysis was conducted through photographic documentation and technical evaluation of each work, enabling a systematic comparison of texture and shape variations according to thinning technique and thinning shear tooth count.
The results indicated that higher tooth counts produced more distinct lightness and flow. Moreover, each thinning technique demonstrated a clearly differentiated character in weight-reduction sensation. Inner thinning enhanced natural flow by reducing internal weight; root thinning created a fuller silhouette by controlling root volume; and line thinning produced a lighter, more defined outline by refining the perimeter length. In particular, 35T inner thinning emphasized soft, curved flow; 30T root thinning produced a balanced outcome between volume and flow; and 35T line thinning highlighted a visually noticeable sense of lightness. Even with identical thinning tooth counts, results varied depending on the technique applied, confirming that where and how thinning is performed is the key determinant of weight-reduction sensation.
These findings provide practical criteria for designing customized services that combine thinning levels and techniques based on a client’s hair thickness, density, elasticity, and desired style. In educational settings, this research can be used as a teaching guideline to help students understand and practice qualitative differences in weight-reduction sensation. Within the industry, it can serve as a resource for improving consultation quality and customer satisfaction through detailed explanations accompanied by visual references. Furthermore, the study holds industrial value as foundational data for standardizing thinning procedures and developing hairdressing tools.
However, this research is limited by its focus on a specific cut—medium-length graduation. Future studies should explore the correlation between thinning levels and weight-reduction sensation across a wider range of cuts, such as long layers, short cuts, and various layered designs. Since the experiments were conducted in a controlled environment using human-hair wigs, clinical validation on real clients with differing hair thickness, elasticity, and damage levels is necessary. Weight-reduction sensation was evaluated through researcher observation and photographic analysis, so future studies should incorporate multi-perspective assessments involving consumers and expert panels. Additionally, only 25T, 30T, and 35T were examined, indicating the need for further research on broader ranges, including below 20T and above 40T.
This study provides valuable educational guidelines for understanding weight-reduction sensation both quantitatively and qualitatively, and offers foundational data for developing standardized manuals and enhancing consultation skills in the industry. Ultimately, it holds significance in shifting thinning services from an experiential practice to one grounded in academic evidence.