Dissemination – sos-murals

Mock-ups preparation

Materials and mock-ups preparation

Supports

Brick

Concrete

Antigraffiti

Silo 112 (permanent protector)

Art-Shield 4 (graffiti cleaner)

Art-Shield 1 (sacrificial protector)

Art-Shield 4 (graffiti cleaner)

Solar radiation protector

Montana matte UV protector

Montana gloss UV protector

Paints

Kromo RAL-6024 green acrylic paint

Kromo RAL-4010 pink acrylic paint

Montana RV-6018 green alkyd paint

Montana RV-115 pink alkyd paint

Acrylic painted mock-ups

Green acrylic paint on brick support

Green acrylic paint on concrete support

Pink acrylic paint on brick support

Pink acrylic paint on concrete support

Spray painted mock-ups

Green spray paint on brick support

Green spray paint on concrete support

Pink spray paint on brick support

Pink spray paint on concrete support

Mock-ups preparation

Green acrylic mock-ups

Pink acrylic mock-ups

Green spray mock-ups

Pink spray mock-ups

Painted mock-ups

Cleaning effectiveness

Soiling process and artificially aging of the mock-ups

Mock-ups before applying diesel soot

Soiling mock-ups

Mock-ups being soiled

Soiling the mock-ups with diesel soot

Soiled acrylic painted mock-ups

Soiled alkyd painted mock-ups

Soiled mock-ups

Measuring color

Using a controlled atmosphere chamber at the University of Lisboa

Controlled atmosphere chamber 300EDTU (ARALAB) with SO₂ exposure.

Conditions:

Relative humidity: 80%.
Temperature: 18°C.
[SO₂]: 200ppm.
Duration: 40 days.

Soiled mock-ups inside the chamber

Soiled mock-ups

Climatic chamber FITOCLIMA 300EDTU

Antigraffiti protection

Antigraffiti application and artificial aging of the mock-ups

Two antigraffiti protectors will be use: Silo 112 (permanent protector) and Art-Shield 1 (sacrificial protector)

Silo 112 permanent protector application

Acrylic painted mock-ups protected with Silo 112

Alkyd painted mock-ups protected with Silo 112

Art-Shield 1 sacrificial protector application

Mock-ups protected with Art-Shield 1

Antigraffiti mock-ups

Samples + antigraffiti protector to be analysed with the spectrophotometer

Color measurement of the antigraffiti mock-ups

Two antigraffiti protectors will be use: Silo 112 (permanent protector) and Art-Shield 1 (sacrificial protector)

Using a controlled atmosphere chamber at the University of Lisboa

Controlled atmosphere chamber 300EDTU (ARALAB) with SO₂ exposure.

Conditions:

Relative humidity: 80%.
Temperature: 18°C.
[SO₂]: 200ppm.
Duration: 40 days.

Mock-ups + antigraffiti protector inside the chamber

Climatic chamber FITOCLIMA 300EDTU

Solar protection

Solar protector application and artificial aging of the mock-ups

Two solar protectors will be used: Montana water based matte UV protector and Montana water based gloss UV protector.

Solar protection mock-ups

Mate solar protector application

Matte protector application

Gloss solar protector application

Gloss protector application

Mock-ups after applying the solar protectors

Mock-ups with protectors in the UVA chamber

Mock-ups with protectors in the UVA Chamber

Mock-ups with protectors in UVB chamber

Outdoor conditions assessment

Assessing paints and protectors in outdoor conditions

North-facing wall

Before Cleaning

North-facing wall with biological colonization before cleaning

During Cleaning

Water pressure cleaning

5% Vol. bleach application

After Cleaning

North-facing wall after cleaning

Cleaned wall

South-facing wall

Before Cleaning

South facing wall before cleaning

During cleaning

Water pressure cleaning

5% Bleach application

After cleaning

Cleaned wall

North-facing wall

Green acrylic paint application

Pink acrylic paint application

Green acrylic painting

Pink acrylic painting

Green alkyd painting

Pink alkyd painting

North-facing wall paintings

South-facing wall

Green acrylic paint application

Pink acrylic paint application

Green alkyd paint application

Pink alkyd paint application

Green acrylic painting

Pink acrylic painting

Green alkyd painting

Pink alkyd painting

South-facing wall paintings

As well as in the lab, two antigraffiti protectors and two solar protectors will be applied in the north and south facing wall.

Antigraffiti protectors (sacrificial or permanent)

Silo 112 application on acrylic paint

Silo 112 application on alkyd paint

Silo 112 (permanent protector) application

Art-Shield 4 application on acrylic paint

Art-Shield 4 application on alkyd paint

Art-Shield 4 (sacrificial protector) application

Solar protectors (matte or gloss)

Matte protector application on acrylic paint

Matte protector application on alkyd paint

Matte solar protector application

Gloss protector application on acrylic paint

Gloss protector application on alkyd paint

Gloss solar protector application

Pictures taken from the protected paints prior to colour measurement, which will be repeated every 40 days. Notches were also taken to be analysed by SEM.

1. Pictures taken on the north-facing wall

1. Pictures taken on the south-facing wall

1. Acrylic paint

1. Alkyd paint

2. Color measurement on the north-facing wall

2. Color measurement on the south-facing wall

2. Measuring color

3. Acrylic green paint nocth

3. Acrylic pink paint nocth

3. Alkyd green paint nocth

3. Alkyd pink paint nocth

Real art work

The mural:” Observing the Ocean” by Delio Rodríguez created within the program “Scientist meet artist” on the side of the building of the Real Club Náutico de Vigo was selected to take part in the study.

Observing the Ocean by Delio Rodríguez

Creating the mural

Painting process

Mural being painted

Mural finished

Mural “Observing the Ocean” in real Club Náutico de Vigo

Protectors application and in situ characterization

As well as in the lab, two antigraffiti protectors (permanent and sacrificial) and two solar protectors (matte and gloss) will be applied on blue and pink paints. Colour will be also monitored over time.

Research area

Color measurement by spectrophotometry

Protectors application

Research area before protectors application

Research area after protectors application

Notch taken to be analysed in the lab

Connecting to society

Analysing the conservation state of two urban murals from Vigo and assessing the effectiveness of different solar protectors by high school students.

Murals used in the StemBach Project 2021-2023

Author Cestola na cachola

Mock-ups preparation and analysis

Mock-ups that replicate the murals colours were prepared, protected and analysed by our Stembach student Victor. (Instituto IES Valadares, Vigo).

UV Protector application

Cross-sectional preparation for SEM analysis using samples taken from actual murals

Colour measurement using Konica Minolta

Data analysis supervised by our researcher Iago Pozo

Final dissertation of the StemBach Project

Here, you can download the final project.