Lars Helldahl

Lars Helldahl PhD Chemistry

Pigment Analysis – Raman Spectroscopy

Lars Helldahl was born in 1950 in Eskilstuna, Sweden. He obtained a master’s degree in Chemistry at Chalmers, Gothenburg, in 1975, and got his first job at ASEA-Atom’s nuclear fuel plant in Västerås, as responsible for analysis operations. He was employed there until 1987, and in the meantime he obtained his PhD at Stockholm University as an industry doctoral student. Between 1987-1990, Lars Helldahl worked as a Technical Attaché at the Swedish Embassy in Tokyo.

After returning to Uppsala, Sweden, he started Kagaku Analys AB and several other companies, such as Hot Disk AB. From 1996, Kagaku Analys AB was the representative for English Renishaw’s Raman instruments for the Nordic countries. For many years, Kagaku Analys AB has also represented several Japanese manufacturers of analysis equipment, such as SPS (Spark Plasma Sintering).

Lars Helldahl has published several articles on Raman spectroscopy and thermal analysis. The Raman works include art, archeology and medical applications. In 2014, Lars Helldahl sold his companies Kagaku and Hot Disk to colleagues in Gothenburg, and now works as Senior Adviser. Since 2018, he has also collaborated with the Ångström laboratory in Uppsala in Raman spectroscopy.

Mark van Gelder

Mark van Gelder MA

Paintings Conservator

Mark van Gelder is a professional paintings conservator currently working independently in Austin, Texas, USA. He holds a Master of Arts with a Certificate of Advanced Training in Art Conservation from New York State University at Buffalo, where his graduate-level training included internships at the Nelson Atkins Museum, the Detroit Institute of Arts, and the J. Paul Getty Museum.

Nina Olivier, photo: Austin Nevin.

Nina Olivier MS

Paintings Conservator

Nina Olivier is a paintings conservator based in Stockholm, Sweden. She holds a Master of Science in Conservation from the University of Gothenburg. She is a member of NKF-S and ICOM.

Inger Nyström Godfrey

Inger Nyström Godfrey BA BS

Archaeological Conservator

Inger Nyström Godfrey is a senior conservator at Studio Västsvensk Konservering (SVK) in Gothenburg, Sweden. She holds a Bachelor of Arts in Classical Arcahaeology and a Bachelor of Science in Conservation, specializing in archaeological artefacts. Both degrees are from the University of Gothenburg.

She has previously worked at Bohus County Museum and at the Western Australian Museum. At SVK she is responsible for the radiographic analyses. She has published several articles in the field of archeological conservation. She is a member of ICOM and NKF-S.


Paintings Conservator

Anna Bronzoni Catellani

Anna Bronzoni Catellani MA

Paintings Conservator

Anna Bronzoni Catellani is a paintings conservator based in Stockholm, Sweden. She is a trained conservator at the Palazzo Spinelli- Nicolini in Florence, Italy. She holds a Master of Art from Uppsala University, Sweden. She has worked as a conservator for the Moderna Museet in Stockholm and has been self-employed since 1990.

She is recognized by the Italian State for her great efforts in the field of conservation and restoration of art and for that she was dubbed a Knight of the ”Cavaliere alla Croce della Solidaritetá Italiana” by the President of Italy Carlo Azeglio Ciampi in 2005.

She is elected by the Swedish Chamber of Commerce as an inspector and valuer. For several years she has conducted research on attribution problems. She holds lectures both nationally and internationally. She is a member of NKF-S and IIC.


Raman Spectroscopy


Raman Spectroscopy

Ka Hå

Carbon-14 Dating