A peeling test known as the “Scotch Tape test” has been used for more than 40 years in conservation practice for assessing the consolidation efficiency of degraded stone. However, the method has not been supported by any standard or reliably verified recommendations for its application. Its applicability is overestimated, and its unrestricted use without adequate knowledge and sufficient understanding can lead to non-comparable, non-reproducible and, in many cases, incorrect and severely biased results and assessments. This paper presents the results of a recent study focused on establishing limits for application, reliable procedures and a “standard” protocol for testing the cohesion characteristics of brittle and quasi-brittle materials, mainly mortars and stones. The main application strategy exploits repeated peeling in the same place on a surface in order to eliminate the effect of the natural decrease in the detached material from the subsurface layers, which might be incorrectly interpreted as a consolidation effect. There is a discussion of factors influencing the performance of the peeling test method, and examples of peeling measurements on various natural and artificial stones are presented.

中文翻译：

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用于评估历史石材表面的凝聚力和固结特性的剥离试验的标准化

被称为“透明胶带测试”的剥离测试已在保护实践中使用了 40 多年，以评估退化石材的固结效率。然而，该方法尚未得到任何标准或可靠验证的建议对其应用的支持。它的适用性被高估了，在没有足够知识和充分理解的情况下不受限制地使用会导致不可比较、不可重复，并且在许多情况下会导致不正确和严重有偏见的结果和评估。本文介绍了最近一项研究的结果，重点是建立应用限制、可靠的程序和测试脆性和准脆性材料（主要是砂浆和石头）内聚力特性的“标准”协议。主要的应用策略利用在表面上的同一位置重复剥离，以消除从地下层分离的材料自然减少的影响，这可能被错误地解释为固结效应。讨论了影响剥离测试方法性能的因素，并提供了各种天然和人造宝石的剥离测量示例。