Who Should Attend?
Professionals, consultants and others interested in the conservation of heritage materials.
Workshop Description:The analysis and restoration of original decorative finishes on modern architectural metals is not always well understood. As a result, such testing or treatment is less well integrated into regular preservation practice than that of other materials and finishes, particularly those in architectural contexts such as decorative painting or plasterwork. Decorative metal finishes may be microscopically thin and fleeting, and they do not typically accumulate in a series of strata that can be sampled and studied through traditional optical microscopy.
There are many reasons why the evidence of a decorative metal finish is often difficult to characterize. These might include:
-its likelihood of being severely degraded or altered through exposure, oxidation and wear;
-the difficulty of discerning an intentional patina from incidental corrosion products;
-the chance that the original scheme may have been intentionally removed.
The instructors have developed a framework of research, investigation and implementation that has resulted in the successful investigation and restoration of significant and complex finishes. This workshop presents an introductory approach to understanding, identifying, investigating and restoring original decorative architectural metal finishes. It includes case studies of successfully completed projects. It will also demonstrate how a variety of instruments from the small and relatively inexpensive (ultrasonic thickness gauge) to the large and highly sophisticated (x-ray fluorescence) can be used to help characterize both the nature and the relative condition of these finishes and their substrates. Additionally, there will be a hands-on workshop which will demonstrate different cleaning methods and materials that are available to the user. These will include, but are not limited to: laser, CO2, water jetting and other forms of abrasive techniques. If time permits, the application of different aesthetic surface treatments and protective coatings will be demonstrated.
- To understand the general history and technology of how complex decorative metal finishes —such as patinas, gilding and plating — are applied or developed
- To understand the deterioration mechanisms that affect these finishes and the implications for their preservation.
- To understand the range of instruments available to help characterize the nature and condition of these decorative finishes and their host metals
- To understand the different cleaning techniques that are available for the treatment of decorative metals and how these impact the surface finish and substrate.
- To understand how different aesthetic surface treatments and protective coatings are applied to decorative metals and the impact theve on the care and maintenance of these materials.
8:00 - 8:30 am Registration at Mattawa Industries 1632 Burlington St. E, Hamilton ON
8:30 - 9:00 am Welcome & Introduction
Presenter introductions, sponsor acknowledgements, learning objectives and introduction to the workshop.
9:00 - 9:50 am Understanding Decorative Metals Finishes in Architectural Applications
An overview of the types of decorative metals and their history of use in architecture. Factors of corrosion resistance, strength and beauty as well as technical advances in mining, refining and alloying influenced the development and introduction of metals. We will review the general applications and their associated periods of use for diverse metals. The use of coatings on metals will also be reviewed. Tools to assist in identifying them in architectural setting, including non-destructive testing both simple and sophisticated and other means will be reviewed. Risk factors and counter-indications for cleaning different types of metals - such as hardness or chemical interactions - will be discussed, as well as available test methods for substrates and their potential benefits to developing a cleaning program. Means of learning from even deteriorated finishes will be reviewed as needed to determine the original finish scheme.
9:50 - 10:40 am Types of Original Finishes and Their Deterioration
The appropriateness and efficacy of different cleaning, restoration, and coating methods are directly related to the type of soiling and deterioration to be mitigated or removed. This presentation will review the nature of different types of corrosion and degradation of architectural metals, their causes and how to determine a treatment scope that will reverse the deterioration and recreate the original finish. The means of preserving the newly restored surfaces and appropriateness of different coating systems will be reviewed.
10:40 - 11:00 am Break
11:00 - 11:50 am Cleaning Methods
An overview of currently available cleaning methods, how they work, and their suitability and risks for different substrates and soiling. Methods to be presented include: Water - misting, low and medium pressure, hot water/steam, detergents; Chemical - acidic, alkaline, chelating agents, solvents, and poultice methods; Mechanical - dry, hand tool methods, and wet and dry micro-abrasive systems; CO2 blasting, and Laser ablation. New developments in research and/or trials on metals cleaning will also be discussed.
12:00 - 1:00 pm Lunch (box lunch provided)
1:00 - 1:30 pm Restoration Parameters and Protocols This presentation looks into a number of parameters that surround and affect decisions on refinishing. These include aligning the goals of treatment with those techniques that can be applied in the field versus shop or factory, the ethics of with expectations, who makes decisions and when, applicable standards, methods of specifying cleaning, developing a cleaning plan, and field considerations such as sequence of work, environment conditions, protection, and field testing and mock ups. Coatings selection will again be reviewed in this context.
1:30 - 4:00 pm Demonstrations Attendees will rotate through demonstrations of various cleaning methods by experienced contractors. Most demonstrations will be performed on the actual masonry of the church building. Demonstrations will include the following categories of cleaning methods:
- Micro-abrasive methods
- CO2 blasting methods
- Laser ablation methods
- Brush plating
- Coatings and corrosion inhibitors
4:00- 4:30 pm Q&A Panel Discussion
Joe Sembrat (Senior Executive Vice President & Senior Conservator, Conservation Solutions Inc.)
Mark Rabinowitz (Executive Vice President, Conservation Solutions Inc.)
Justine Posluszny Bello (Vice President of Operations, Conservation Solutions Inc.)
Kelly Caldwell (Conservator, Conservation Solutions Inc.)
Kelly Caldwell, CSI Conservation Solutions ULC (CSI) – Kelly is a fully qualified conservation professional who has been working and volunteering in the fields of archaeology and conservation for over ten years with a key focus in archaeological contexts. Upon completion of her graduate training, Kelly supplemented her continued fieldwork with additional experience at the British Museum where she focused on inorganic materials, including stone, wall
Kevin McSwain (Mattawa Industrial Services Inc.)
If registered for the Conference : $100
If not registered for the Conference : $125 * choose registrant type Tours and Workshops only