Test report filtre formaldehyd / formalin

1. Test Report No. T 11434 - 01 Issue 1 NIOSH TEB - APR - STP - 0039A: Formaldehyde Service Life BLS srl BLS Model s 242 ABE2 & 243 ABEK2 Respirator Cartridges 3 March 2017 Authorized and Reviewed by: Performed by: Michael G. Gergel Prabodh K . Patnaik Manager – Physical & Analytical Chemistry Physical / Analytical Scientist a) Reports are issued pursuant to the ICS standard Terms and Conditions agreement. b) The contents of this test r eport are confidential. Reproduction of the report is prohibited except in full, unless approved in writing by ICS Laboratories, Inc. c) Unless otherwise indicated, the test results contained in this report apply only to the samples tested and not to lot s or batches from which they were taken. d) Where applicable, test data provided by subcontractor is uniquely identified in the test report. e) Where applicable, test data not covered under our ISO/IEC 17025 Accreditation is uniquely identified in the te st report. WARNING: This Test Report may contain technical data whose export is restricted by the Arms Export Control Act (Title 22, U.S . C., Sec 2751, et seq.) or the Export Administration Act of 1979, as amended, Title 50, U.S.C., App. 2401 et seq. and which may not be exported, released or disclosed to non - U.S. persons (i.e. persons who are not U.S. citizens or lawful permanent residents ["green card" holders]) inside or outside the United States, without first obtaining an export license. Violations o f these export laws are subject to severe civil, criminal and administrative penalties. ICS Laboratories, Inc. ●1072 Industrial Parkway North ● Brunswick, Ohio 44212 USA Phone: 330.220.0515 Fax: 330.220.0516

4. Issued to: BLS srl. Date : 3 March 2017 Via Dei Giovi, 41 Report: T11434 - 01 20032 Cormano (MI) Issue: 1 Italy Page: 3 of 3 Photographs: Figure 1: BLS respirator cartridges \ Figure 2: Formaldehyde service life in progress

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3. Issued to: BLS srl. Date : 3 March 2017 Via Dei Giovi, 41 Report: T11434 - 01 20032 Cormano (MI) Issue: 1 Italy Page: 2 of 3 Results: The physical measurements and formaldehyde service - life results for the cartridges are summarized below. Table I Physical Measurements for filter s tested against Formaldehyde Cartridge ID Initial Weight (g ) Initial Resistance (mm . H 2 O @ 85 LPM) Conditioned Weight (g) Final Weight (g) Final Resistance (mm. H 2 O @ 85 LPM) Inhalation Exhalation Inhalation Exhalation 1 121.4 21.6 20.9 AR 125.0 21.1 23.0 2 135.8 AR 137.4 3 120.3 20.2 19.9 AR 124.9 19.9 21.7 4 136.4 AR 138 .0 5 121.3 21.1 20.8 AR 126.0 20.5 22.1 6 138.4 AR 140.1 7 121.2 19.0 18.2 124.1 123.7 18.2 19.4 8 129.8 129.0 128.2 9 119.0 19.3 18.9 121.1 121.3 18.7 20.3 10 133.5 131.2 131.6 11 120.3 19.5 19.3 136.4 131.1 18.5 20.1 12 137.6 151. 6 145.2 13 121.4 19.8 19.4 138.1 135.6 19.4 20.7 14 132.9 148.1 144.9 Table II Service Life Results for filter s tested against Formaldehyde Filter No. Filter Conditioning RH (%) Test Condition HCHO Conc. (ppm) Down - stream Temp. (º C) NIOSH BT spec. Measured BT Conc. (ppm) Measured BT Time (min) Result Airflow (LPM) RH (%) Temp. (25 o C) Conc. (ppm) Time (min) 1, 2 AR 64 50 25 100 26.0 1.0 50 0.14 60 Pass 3 , 4 AR 64 50 25 100 26.0 0.16 60 Pass 5 , 6 AR 64 50 25 10 0 25.6 0.04 60 Pass 7 , 8 25 64 25 25 100 23.7 0.06 60 Pass 9 , 10 25 64 25 25 100 23.9 0.01 60 Pass 11 , 12 85 64 85 25 100 31.0 0.03 60 Pass 13 , 14 85 64 85 25 100 30.5 0.17 60 Pass

2. Issued to: BLS srl. Date : 3 March 2017 Via Dei Giovi, 41 Report: T11434 - 01 20032 Cormano (MI) Issue: 1 Italy Page: 1 of 3 Summary: Two models of A BE2 filters for a twin - cartridge a ir p urifying half - mask r espirator were evaluated for formaldehyde service li fe in accordance with NIOSH Procedure RCT - APR - STP - 00 39A . The samples were submitted by BLS srl. All samples met the requ irement , as specified in the standard. Objective: Testing to: NIOSH TEB - APR - STP - 0039A : “Determination of Formaldehyde Service Life Test, Air Purifying Respirators with Cartridges Standard Testing Procedure” Revision: 2.0 Date: 1December 2008 M aterials: Sample ID . Description Quantity BLS 2 42 BLS 2 42 ABE 2 Filter cartridge for twin cartridge h alf - m ask respirator 16 BLS 243 BLS 243 ABEK 2 Filter cartridge for twin cartridge half - mask respirator 16 - Cartridge adapter, Bayonet mount 2 Date provided by the Client: 16 December 201 6 Date Testing Authorized: 5 January 2017 Dates of tests: 27 February - 2 March 2017 Manufacturer / Supplier: BLS srl Equipments and Reagents: Miller Nelson Humidity Control Systems , HC S - 401 (EQ0380) Digital Balance , Acculab V - 600 (EQ0112) Syringe Pump (EQ0360) Test Chamber , 13” x 9” x 18”, custom designed Digital Thermometer , (EQ0325) Vaisala Humidity and Temperature Indicators (EQ030 7 & EQ030 8 ) Electronic Timer , Co ntrol Company (EQ 1150 - 11 ) Custom Test bench for Inhalation and Exhalation Resistance Formaldehyde Gas Analyzer , Interscan Corp. (EQ0429) Formaldehyde, 37%, Sigma - Aldrich Procedures: Testing protocols in accord with good laboratory practice were employed for all tests. The equipment and instrument calibrations verified current and within specification, prior to use. Materials for assessment were inventoried, numbered (if needed) and logged upon receipt. Fourteen filter cartridges were ev aluated for formaldehyde service life test. All the tests were performed in general accordance with NIOSH procedure TEB - APR - STP - 00 39A . Four cartridges, each, were subjected to low and high humidity conditioning, prior to service life test. Three sets of cartridges in the “As Received” state (AR) along with the humidity conditioned cartridges were then tested for formaldehyde service life as presented in the tables in the following page s . Both, the models model 242 and model 243 were used in pairs for eac h test.