Part 1 – Conservation Works In The Hall Of The Town Hall In Lwówek Śląski.1. The Subject Of The Order Is The Performance Of Conservation Works Provided For In The Conservation Work Program - Renovation Of The Stonework Of The Vestibule Of The Town Hall Of The Town Hall In Lwówek Śląski, Prepared By The Conservator Of Works Of Art, Jacek Gryczewski, M.A., February 2024, In Accordance With The Decision Of March 21, 2024, No. 585/2024 Permission To Carry Out Conservation Work On The Monument, Lower Silesian Provincial Conservator Of Monuments. The Task Also Includes The Execution Of Tasks Described In The Conservators Decision No. 585/2024, In Particular: After Testing The Layer Of Repainting Of The Stone And Carrying Out Trial Cleaning Works, A Detailed Course Of Conservation Should Be Agreed Upon By A Commission With A Representative Of Dwkz; Immediately Notifying Dwkz About Threats Or New Circumstances Revealed During The Work; Keeping Documentation Of The Course Of Work In A Way That Enables Clear Identification And Precise Spatial Location Of All Activities, Materials Used And Discoveries Made, And Forwarding It To The Ordering Party For Transfer To The Dwkz; Developing A Method Of Dealing With The Monument After Completion Of The Works And Handing It Over To The Ordering Party For Transfer To The Dwkz. 1.1. Stone Interior Decoration Of The Hall Of The Burgesian Hall: 1) Laboratory Tests Determining The Chemical Composition Of The Darkened Layer Of Repainting Of Sandstone Vaults. 2) Initial Cleaning Of The Stone Surface - Removal Of Loose Dirt. 3) Strengthening Of Weakened Parts Of Sandstone Before Cleaning By Preliminary Impregnation 4) Mechanical Removal Of Secondary Layers In The Form Of Plasters, Trowels And Paints Using Scalpels And Soft Ones Brushes After Applying Softening Compresses Using Mixtures Based On Organic Chemicals - Determined On The Basis Of Conducted Research. 5) Further Cleaning Of Sandstone Surfaces. The Effectiveness Of The Action And The Amount Of The Given Preparation Will Be Determined After Tests. 6) Local Removal Of Dirt From Stonework And Sculptural Details Using A Steam Generator. This Method Allows For Precise Removal Of Secondary Layers Without Disturbing The Original Texture Of The Substrate.7) Surface Disinfection With A Biocidal Preparation In Places Requiring It. 8) Desalting Of Stone Elements By Free Migration Of Salt Into An Expanded Environment. The Treatment Will Be Performed Using Compresses Made Of Wet Paper Pulp Or Lignin.9) Impregnation - Structural Strengthening Of The Weakened Stone In Places Requiring It Using An Organosilicon Preparation.10) Gluing The Cracked Fragments Of Stonework Using Polyester Resins With Filler. The Joints Should Be Strengthened And Stabilized With Stainless Steel Dowels.11) Filling The Missing Stone Joints With A Mineral Mass Using A Conservation Mortar.12) Filling The Missing Stone Joints With A Mineral Mass, Similar In Composition And Properties To The Original Joint.13)
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